can't get 4g to work on unlocked T mobile phone

[olwogo]

Hey guys I need help with this phone. I did an unlock on a T mobile Galaxy SII T989 phone so I could use it in AT&T's go phone. It is a 4g phone and (when on T mobile) worked great on 4g. It works well on AT&T, all but the 4g. Does anyone know how to fix this glitch or is it just the way the phone was configured for T Mobile? Any help would be appreciated!!

 

[Golfdriver97]

Hey guys I need help with this phone. I did an unlock on a T mobile Galaxy SII T989 phone so I could use it in AT&T's go phone. It is a 4g phone and (when on T mobile) worked great on 4g. It works well on AT&T, all but the 4g. Does anyone know how to fix this glitch or is it just the way the phone was configured for T Mobile? Any help would be appreciated!!

Welcome to the forums!
I think the differences between the two companies is what is causing the problem. Tmo used HSPA+ for 4G and I think AT&T has always used LTE. Two different radios.

 

[Mellimel22]

No that's not it. The Tmo version doesn't have the proper radios for att lte. Att mostly work off of the 700mhz band with only a couple markets on the 1700 band. Tmobile is using 1700 strictly. That's why u are not getting lte and only hspa+.

Sent from my T-Mobile LG Escape using Tapatalk 2

 

[olwogo]

So no way to make this phone work in 4g mode with AT&T. Short of getting a new phone. Thanks for the information. I will continue to learn about this and see what I can learn. I like this forum, I already saved myself a 50 mile drive. I shall read more on my phone. Thanks!!

 

[Mellimel22]

Because Tmobile uses 1700mhz for hspa+(aka4g) except in markets where they refarmed the data to make it run on 1900 like att. So bottom line if your area isn't refarmed u will be on edge or worse.

Sent from my T-Mobile LG Escape using Tapatalk 2