MTK 6761 ROM USA Conversion qin f21 pro

I have a Chinese phone running an MTK 6761 chipset and need its firmware rebuilt so it works flawlessly in the United States. The core of the job is two-fold: 1. Re-map the radio firmware so the handset locks onto the correct U.S. bands for Verizon and T-Mobile, with stable data, voice, VoLTE and, if possible, Wi-Fi Calling. 2. Bake full Google Mobile Services into the ROM so the Play Store, Play Services and SafetyNet-dependent apps pass without patches or side-loads. If you can leave the door open for future AT&T support, great—but Verizon and T-Mobile are the priorities. Deliverables • A flashable ROM package (scatter file plus system, boot, vendor, modem, etc.). • Clear flashing instructions for SP Flash Tool or custom recovery on Windows/Linux. • A short changelog outlining every change you make. • A quick validation step—remote session or test APK—that proves the phone registers and passes traffic on Verizon and T-Mobile. Once I confirm data, voice and messaging are solid and Google services sign in cleanly, the job is done. [Removed by Freelancer.com Admin]

Project ID: 40312740