Hi,

I have a BV8000 PRO, it works fine on both AT&T and T-MOBILE network.

So I'm happy to upgrade it to BV9000 PRO, and I just got it today.

When I put my old SIM cards on BV9000 PRO, it can't find service on AT&T network. T-Mobile works fine though.

I don't know how to return it on TOMTOP, but I will try.

I do some search and and found this discussion, seems this is a common problem.

https://forum.xda-developers.com/androi ... r-t3739470

Please find a solution. Please!

hello,
First you have to contact your phone carrier to get your correct APN settings, which you have to set.
Then enable your data connection and everything will work.