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Project overview We are looking for an experienced Android developer with deep knowledge of Qualcomm modem internals to build a native Android application that controls cellular network selection at the hardware level using NV Items. The app must run on rooted Qualcomm-based Android devices. Core requirements App must run on Qualcomm-based Android phones with root permissions. Communicate with the modem via NV Items (QCRIL / AT commands or equivalent low-level interface). Key features — NV item-based locking The main purpose of the app is to lock the device to specific network parameters: Technology lock — restrict the device to a single RAT: GSM, UMTS, LTE, or 5G NR. Band lock — lock to a specific frequency band within the selected technology. Channel lock — lock to a specific channel: BCCH (2G), ARFCN (UMTS / 3G), or EARFCN (LTE / 4G). Cell parameter lock — lock to a specific cell identifier: Scrambling Code (SC) on UMTS, or PCI on LTE. Ideal candidate has Prior experience with Qualcomm RIL, DIAG protocol, or NV item manipulation on Android. Good understanding of cellular network fundamentals (2G/3G/4G/5G air interfaces). Experience with rooted Android development (root shell, su, Magisk modules, etc.). Ability to test on real Qualcomm hardware (Snapdragon-based devices preferred). Deliverables Working APK with all lock features described above. Source code (clean, commented). Brief documentation on how to use and extend the app.
Project ID: 40417684
82 proposals
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Active 14 days ago
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82 freelancers are bidding on average €2,318 EUR for this job

Hi there, I understand you want a native Android app for Qualcomm-based devices that can control cellular network selection at the hardware level via NV items, running on rooted phones. I will design a secure, testable app architecture that communicates with the modem using QCRIL/DIAG interfaces or equivalent, while ensuring safe root access handling and clear user feedback. The approach focuses on clear modular layers: a low-level driver for NV item reads/writes, a robust service layer with proper retries and error handling, and a clean UI that presents technology, band, channel and cell parameter locks with safety checks and rollback options. I will provide clean, well-commented source code and documentation, plus an APK to verify all lock features described above. What is the primary target device range and Android versions you want supported, and are you open to a phased rollout for varying Qualcomm generations? Key questions I will confirm with you include: 1) Are there preferred Qualcomm platforms or exact modem generations to target? 2) Do you require real-time monitoring of NV item status or just configuration? 3) Which Android API levels must be supported? 4) Any constraints on Magisk module packaging or root-method compatibility? 5) How should conflict resolution be handled if multiple locks collide? 6) Will you provide test devices or should I source Snapdragon devices? 7) Is there a preferred build system or CI workflow? 8) Any security or logging requirements f
€3,000 EUR in 13 days
9.3
9.3

With over a decade of experience in full-stack architecture and high-scale systems, I understand your need for an experienced Android developer with deep knowledge of Qualcomm modem internals to build a native Android application that controls cellular network selection at the hardware level using NV Items. My background in scaling Telegram Mini Apps to serve over 1 million users directly applies to the complexity of your project's requirements. For strategic insight, ensuring the app's scalability and security is critical. I have successfully implemented similar high-level features in past projects, demonstrating my ability to handle the level of complexity needed for this task. I encourage you to reach out to discuss the roadmap for your Qualcomm Android App project. I am confident in my ability to deliver the working APK with all the required lock features, along with clean source code and documentation. Let's connect to ensure the success of your project.
€2,400 EUR in 30 days
8.4
8.4

Hello, We understand you're seeking an Android developer with deep expertise in Qualcomm modem internals to build a native app for precise cellular network selection via NV Items on rooted devices. Our team is proficient in low-level modem communication and capable of implementing robust technology, band, channel, and cell parameter locking features. We are well-versed in Qualcomm RIL/DIAG and rooted Android development to deliver your specific requirements. I’m Waqas from Eclairios, a professional software engineer with over 7 years of experience in app and web development. I have successfully completed 128 projects, earning a 5.0 rating from satisfied clients. I specialize in mobile apps (Android, iOS, Flutter), website development, custom APIs, and backend solutions. My goal is to deliver high-quality, scalable solutions that meet your business needs. Why hire me? ★ 100+ Projects Completed with 5-star rating. ★ 3 months of free post-launch support ★ Expertise in advanced technologies and systems Let’s connect and discuss how I can help you with your project. Best regards, Waqas
€1,725 EUR in 7 days
8.4
8.4

With our impressive repertoire covering all aspects of mobile development, including deep knowledge of the Qualcomm modem internals that your project requires, we can assure you that choosing us would be the best decision you make for this project. Our expertise with Android and rooted development, along with prior experience with Qualcomm RIL and DIAG protocol, vests us with particular know-how in manipulating NV items on Android. Moreover, we bring a unique understanding of cellular network fundamentals, a major advantage for an app as nuanced as this. Our ability to test on real Qualcomm hardware would also ensure a thorough validation of the app's functionality and reliability. We have developed APKs which had low-level interfaces to utilize QCRIL/AT commands before which would serve as a solid foundation for your project. Lastly, driven by the goal of delivering efficient, user-friendly solutions, we will not only provide you with a working APK complete with all lock features described but also a concise documentation on how to use and extend the app. Your vision is unique and extraordinary - let us help you bring it to life!
€1,500 EUR in 25 days
8.4
8.4

Hi, To build a native Android application that controls cellular network selection, I'll develop an APK that communicates with the modem using NV Items. This will include: - Implementing technology, band, channel, and cell parameter locks. - Ensuring compatibility with rooted Qualcomm-based devices. - Providing clean, commented source code. - Creating brief documentation for usage and extension. I'll follow a structured approach to ensure all features work seamlessly on real Qualcomm hardware. Ready to start once you provide the necessary access to the devices for testing. Thanks!
€2,000 EUR in 14 days
6.8
6.8

I can help with this, I will build the native Android app that communicates directly with the Qualcomm modem via DIAG/QCRIL to perform NV item-based locking — technology lock, band lock, channel lock (BCCH/ARFCN/EARFCN), and cell parameter lock (SC/PCI) — along with full source code and documentation. For the modem interface, I will use the /dev/diag character device with proper DIAG command framing rather than relying solely on AT commands, since NV item reads and writes through DIAG give more reliable and granular control over modem parameters. I will also implement validation so the app prevents writing conflicting NV configurations that could leave the modem in a non-functional state — with a safe rollback to default values if needed. Send me a message and we can go over the details. Best regards, Kamran
€1,664 EUR in 30 days
7.4
7.4

Hi, I'm Reed from Reedsystems, an experienced Android developer with over a decade in the field. I am excited to bid on your project to build a native Android application that controls cellular network selection at the hardware level using NV Items. My approach: - App will run on Qualcomm-based Android phones requiring root permissions. - Will communicate with the modem via QCRIL/AT commands or equivalent low-level interfaces. - Key features include: - Technology lock (GSM, UMTS, LTE, 5G NR) - Band lock (frequency band within selected technology) - Channel lock (BCCH, ARFCN, EARFCN) - Cell parameter lock (Scrambling Code on UMTS, PCI on LTE) I have extensive experience with: - Qualcomm RIL and DIAG protocol - NV item manipulation on Android - Rooted Android development including root shell, su, Magisk modules - Testing on real Qualcomm hardware (Snapdragon-based devices preferred) - Cellular network fundamentals (2G/3G/4G/5G air interfaces) Deliverables: - Working APK with all lock features implemented. - Clean and well-commented source code. - Brief documentation for usage and further extensions. You can review my portfolio here: https://www.freelancer.com/u/reedsystems Looking forward to the opportunity to work on this project! Reed
€2,300 EUR in 25 days
5.9
5.9

⭐⭐⭐⭐⭐ ✅Hi there, hope you are doing well! I have developed native Android applications interfacing directly with hardware modems using low-level protocols, enabling precise control over network parameters on Qualcomm devices. From my experience, understanding and correctly implementing NV Item interactions and root-level commands is crucial for achieving stable and effective network locking functionalities. Approach: ⭕ I will thoroughly study your specific modem and Qualcomm RIL requirements. ⭕ Develop the app to interface with the modem through QCRIL/AT commands with root permissions. ⭕ Implement technology, band, channel, and cell parameter locking features as requested. ⭕ Test extensively on rooted Snapdragon devices for reliability. ⭕ Deliver clean, documented source code and user guides. ❓ Could you please specify the exact Qualcomm chipsets and Android versions you want to support? I am confident I can deliver a robust and effective app that meets your requirements fully. Best regards, Nam
€2,500 EUR in 15 days
5.2
5.2

With hands-on experience in Qualcomm RIL and NV item manipulation on Android, I understand the intricate requirements of controlling cellular network selection at the hardware level using NV Items. Can you provide more details about the specific Qualcomm-based devices the application needs to be compatible with? Regards, Yogesh Kumar
€2,040 EUR in 8 days
5.4
5.4

Hi, I have thoroughly reviewed your project requirements for a Qualcomm Android app developer skilled in modem internals and NV item-based controls. With extensive experience in Qualcomm RIL, rooted Android development, and deep understanding of cellular network technologies from 2G to 5G, I am confident in building a native app that precisely locks network parameters at the hardware level. I am well-versed in QCRIL, DIAG protocols, and can ensure the app functions flawlessly on Snapdragon-based rooted devices. I will deliver a clean, commented source code APK along with clear documentation for easy use and expansion. I propose starting with a detailed technical discussion to finalize feature specifics, followed by development and thorough real-device testing, aiming to deliver within 18 days. Could you share which specific Qualcomm devices and Android versions you plan to primarily target for this app? Best regards,
€2,500 EUR in 10 days
5.0
5.0

As an exceedingly skilled Full-Stack Developer proficient in contemporary mobile app design and development, I'm excited about the opportunity to apply my unique skill set to your project. My diverse experience with Android, Java, Software Development, as well as various other mobile development languages such as Flutter, Ionic and React Native makes me the perfect fit for your need for a Qualcomm Android App Developer. Moreover, my expertise extends to root-related development activities like manipulating NV items and using Qualcomm RIL and DIAG protocols on Android. Additionally, I have a deep understanding of cellular networks which is vital for developing an application with the kind of functionalities you are seeking. Furthermore, my commendable track record in consistently delivering high-quality work, on time, combined with my dedication to ensuring 100% client satisfaction and excellent communication skills makes me the ultimate package for your project. Don't just take my word for it—Iཉm more than happy to provide examples of comparable projects I have successfully delivered. Let's collaborate to turn your vision into a groundbreaking mobile application
€1,500 EUR in 7 days
4.9
4.9

Hey there! I hope this message finds you well. I'm really excited about your project and would love the opportunity to help you build this Android app. With my extensive experience in Android development and deep understanding of Qualcomm modem internals, I’m confident I can meet all your requirements. I've worked with NV Items before and have hands-on experience with rooted devices, so I'm well-prepared to tackle the challenges in this project. I'll ensure that every feature, from network technology locks to cell parameter locks, is implemented effectively and tested on real Snapdragon hardware. Plus, I'll provide clean code along with clear documentation for ease of use and future updates. Let's connect soon so we can discuss how I can bring my skills to your project. Looking forward to hearing from you!
€2,250 EUR in 7 days
4.2
4.2

I can help you deliver a robust Android application optimized specifically for Qualcomm-based devices. I’ve worked extensively with low-level Android hardware integrations, performance tuning, and device-specific feature support, which aligns directly with your need for deep Qualcomm expertise. My background includes projects involving Snapdragon-based devices, custom ROM integrations, and leveraging Qualcomm SDKs for performance profiling, camera, and connectivity features. This experience helps ensure your app is both stable and efficient across targeted chipsets. I would start by reviewing your requirements, defining device and OS targets, then setting up a Qualcomm-focused build and testing pipeline. From there, I’d iterate on core features, run on-device performance checks, and document everything for your team. I would love to chat more about your project! Regards
€2,250 EUR in 7 days
4.2
4.2

Greetings, I can confidently handle this Qualcomm Android App Developer role. Being a Senior Android Developer with extensive experience in Qualcomm modem internals, I have successfully developed native Android applications that interact with hardware at a deep level. My expertise includes communication with modems via NV Items and implementing network selection controls on rooted Qualcomm-based devices. I invite you to review my profile for more details and discuss further on freelancer.com. I will deliver: - App running smoothly on Qualcomm-based Android phones with root permissions. - Efficient communication with the modem through NV Items for network parameter locking. - Comprehensive features for technology, band, channel, and cell parameter locking. High-quality work guaranteed. Message me on freelancer.com to take this project forward. Regards, Moeed
€1,500 EUR in 7 days
4.2
4.2

Hello, Are you seeking a skilled Android developer with expertise in Qualcomm modem internals for your project? I have a strong background in C Programming, Java, and Android App Development, making me well-suited for this task. I understand the core requirements of your project, including the need for the app to run on Qualcomm-based Android phones with root permissions and communicate with the modem via NV Items. My experience in software development and mobile app development aligns perfectly with the key features you outlined, such as technology lock, band lock, channel lock, and cell parameter lock. With prior experience in Qualcomm RIL and DIAG protocol, I am confident in my ability to deliver a high-quality APK with all the specified lock features. Additionally, I have a good grasp of cellular network fundamentals and rooted Android development, ensuring a smooth and efficient project execution. Looking forward to the opportunity to work on this exciting project. Best regards, Jayabrata Bhaduri
€2,500 EUR in 7 days
3.9
3.9

Waem Hello! This is a highly specialized Android + Qualcomm modem project involving NV item-level control, and we can help you build a stable rooted-device solution with proper low-level integration. We’re a team of 62 professionals with over 9 years of experience in Android system development, RIL-level work, and embedded/modem communication. Here's how we can help: Develop native Android app with root (Magisk/su) support for Qualcomm-based devices Integrate NV item access via QCRIL / DIAG / AT command interfaces Implement technology lock (GSM/UMTS/LTE/5G NR) at modem level Build band, channel (BCCH/ARFCN/EARFCN), and cell-level locking (PCI/SC) Ensure safe modem communication handling to avoid device instability or RF crashes Deliver clean, documented source code + working APK We would approach this using Android NDK + Java/Kotlin layer, combined with shell-level modem interaction and Qualcomm diagnostic tools where supported. Testing and validation would be done on Snapdragon-based rooted devices to ensure real-world stability.
€2,250 EUR in 7 days
3.3
3.3

Hello, I am Vishal Maharaj, a seasoned professional with 20 years of expertise in C Programming, Software Development, Android App Development, Android, Java, Mobile Development, and Mobile App Development. I have carefully reviewed the project requirements and am confident in my ability to deliver a native Android application that controls cellular network selection at the hardware level using NV Items on Qualcomm-based devices. I plan to utilize my in-depth knowledge of Qualcomm modem internals to create an app that communicates with the modem via NV Items, allowing for technology, band, channel, and cell parameter locking as specified in the project description. I am well-versed in Qualcomm RIL, DIAG protocol, and rooted Android development, ensuring a comprehensive solution that meets all core requirements. I invite you to initiate a chat to discuss the project further. Cheers, Vishal Maharaj
€2,000 EUR in 20 days
3.3
3.3

Hi, Project requires a native Android app that controls Qualcomm modem network selection via NV Items on rooted Snapdragon devices, locking RAT, band, channel and cell identity. I see clear needs for DIAG/QCRIL integration and real-device validation across 2G–5G air interfaces. With 10+ years in Android development, I apply deep Java/Kotlin and rooted-shell expertise to build low-level modem interfaces, su/Magisk workflows and secure root execution. My background in scalable, documented code and C-adjacent integration supports reliable NV item manipulation, band/EARFCN/PCI/SC locking and extensible architecture tuned to Qualcomm RIL internals. I will deliver a tested APK with clean, commented source and concise usage documentation, enabling repeatable lock profiles and safe extension. Emphasis on stability, logging and on-device verification ensures predictable behavior on target Qualcomm hardware. Lets connect in chat so that we discuss further. Regards, Mohd Nadeem Khan
€2,250 EUR in 28 days
2.6
2.6

Hi there, You’re in the right place. I’ve successfully handled similar projects before and understand how to execute them efficiently from the start. To better define the scope, timeline, and pricing, I’d like to ask a few important questions. Due to Freelancer’s character limit, I’m unable to explain everything in detail here. Let’s connect on chat so I can share relevant past work, explain the results I’ve achieved, and provide a clear plan for your project. This will give you a better idea of my approach and how I can help. If you're ready to move forward, I’m available to discuss anytime. Looking forward to connecting. Best regards, Mayank sahu
€1,500 EUR in 20 days
3.0
3.0

With hands-on experience in Qualcomm modem internals and Android development, I'm well-equipped to craft a bespoke Android app for cellular network selection using NV Items. Can you share specific Qualcomm device models you're targeting for this project? Regards, Rahul Paspola
€1,620 EUR in 6 days
1.7
1.7

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