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Custom ROM and kernel developer to add USA frequency bands to my custom phones

This project is for a CUSTOM ROM and kernel expert. I need to add all USA frequency 4g LTE bands to this phone QIN 1s+ so that it works in the USA... It has spreadtrum A53 chip

I work directly with the phone factory, so I have all system files for the phones

Things to note about the Frequency problems I am having with the phone:

1. AT&T doesn’t recognize it as a 4g phone (but phone calls and text messages works only on HSPA+) 2. T-Mobile recognizes 4g internet but not 4g phone calls This is the phone [https://www.banggood.com/QIN-1S+-VoLTE-4G-Network-Wifi-4G+[login to view URL]]

Skills: Linux, Android, C Programming

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About the Employer:
( 11 reviews ) lakewood, United States

Project ID: #31180560

4 freelancers are bidding on average $750 for this job

gregtechnola9

Hi, Greetings for the day!! I have gone through your requirement and understood every aspect of them. I have checked the URL. I will do all the Proficient and Competent Workout. I have 5 years of Work Experience i More

$500 USD in 7 days
(9 Reviews)
5.4
nizamfarhas

Hi! I have just noticed your project Custom ROM and kernel developer to add USA frequency bands to my custom phones and very interested in it. I am a developer who well skilled for this project and skills Linux, C Pr More

$500 USD in 6 days
(0 Reviews)
0.0
dmitriydmitrenk7

How are you doing? I read your requirements and I am very interested in discussing further regarding the website. I have strong experience in developing websites using Android, Linux and C Programming I will give y More

$500 USD in 5 days
(0 Reviews)
0.0
johenappa

Hi, Greetings! I have seen your posted job details and I feel very much interested to work with you. I consider myself a perfect match for this job because I am working as ✅ ROM since the last 5 years. I worked on More

$1500 USD in 2 days
(0 Reviews)
0.0