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Add all USA GSM and LTE bands to QIN 1s+ Spreadtrum A53 chip -- 2

This project is for a data network 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 have the phone with me and :

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: C Programming, Android, Mobile App Development, Linux, Software Architecture

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

Project ID: #31067154

6 freelancers are bidding on average $683 for this job

saubhagyamweb

********************************************** Hello There, I’m a Professional and Expert Mobile Developer. I am interested in doing this job for you. I do have necessary skill set & resources to complete this projec More

$500 USD in 7 days
(24 Reviews)
6.1
Digiexpert90

Hello Hiring Manager, I read your job descriptions carefully, I am very interesting in your job of Add all USA GSM and LTE bands to QIN 1s+ Spreadtrum A53 chip I have the enough experience and good project done with g More

$1450 USD in 7 days
(8 Reviews)
5.4
(3 Reviews)
4.9
tayabani

Yo! I am ready to work with you, I have read your requirements and I am confident that I will deliver you the Add all USA GSM and LTE bands to QIN 1s+ Spreadtrum A53 chip -- 2. I am professional programmer with skill More

$650 USD in 15 days
(3 Reviews)
2.8
artsiom1liaver

Hello, I have just read your requirements and so interested in your job. I am very confident about this project as I am a skilled senior Full-Stackdeveloper. I am familiar with C/C++/C#, Mobile Development and I have a More

$500 USD in 7 days
(1 Review)
1.5
eddyalves

Hi, I have full time job as software engineer working on Android based mobile phones with focus on base band processor, most Qualcomm platforms like snapdragon, and working on mobile communication protocols ((LTE, WCDM More

$500 USD in 7 days
(0 Reviews)
0.0