Can anyone help me?
the SM-J320P Model (Sprint Carrier variant) is not compatible with Republic it is a CDMA phone and there is no CDMA BYOD option and the only version of the J3 that is compatible is the GSM Regional Factory Unlock SM_J320A with the correct build numbers
in your case it’s a software and a hardware issue
- Samsung Galaxy S6 (SM-G920T)*See more info below
- (Apps → Settings → About device → Model number)
*For the Pixel, Pixel XL, Samsung Galaxy J3 and S6 phones only: In addition to matching the model number, you also need to match the build number. This additional step ensures that you’re receiving a Republic certified phone, meaning it’s been thoroughly tested by our engineers and has received updated quality improvements.
Some J3 phones have an older build number and can be updated to the build number listed below, so please make sure your J3 has all of its updates before checking the build number. To find the build number, tap Apps → Settings → About device → Build number. The build number must match one of the following:
For Samsung Galaxy J3 (the AT&T branded version of this phone is not compatible with our service)
TL;DR: You can’t do anything to get it to work with Republic.