Using iPad mini with tmobile nano sim, but no data
I just bought an iPad mini AT&T 4g LTE to use with my tmobile nano sim. I put the SIM card in and the tmobile network is registered and I see 3G. I try to use the Internet but I get no data. It is currently on iPod 6.1.3 and the carrier is 14.0. Is there a way to upgrade the carrier to 14.1, will that help out. Also, is there proper apn settings I can use to use the data on my tmobile data plan? It doesn't make sense to get tmobile and 3G for the network and not being able to download data, not even edge speeds.
iPad, iOS 6.1.3