[ststephene]

I recently purchased a Q10 from T-Mobile and after using it on their network for a few days had it unlocked. Today I placed my work phone�s AT&T SIM in the Q10 which works fine in a 9700 and was unable to get data service only voice. It was my understanding that both the T-Mobile and AT&T Q10s use the same 4G bands so I don�t know why it�s not working. I noticed the APN setting name changed from �fast.t-mobile.com� and not greyed out to �phone� and it is greyed out. Any ideas on how to fix this would be appreciated.

[raino]

They don't use the same radio bands everywhere, but the TMO Q10 has all the bands AT&T uses.

It definitely sounds like an APN issue to me. Do you know someone else with a Q10 on AT&T whose APN settings you could look up? A Z10 would probably work too.

[ststephene]

No, I don’t know anyone else with a Q10 I could check for APN settings. I’m not sure how the APN stuff works, that AT&T SIM in a different phone I have has an APN name of “wap.cingular” along with a username and password.

[raino]

Sometimes these APNs change with networks. For example, T-Mobile's LTE APN is "fast.t-mobile" whereas their 3G APN I believe was "epc.t-mobile." If AT&T's APN (for any network) is not "phone," you'd want to get it un-greyed out so that you can change it to whatever APN it needs to be. Hope someone in this sub-forum knows exactly what to do.

[raino]

According to this post, "phone" is the correct APN (at least for the Z10 it is.) And I assume you have a data plan already.

Edit 2: seems like there is at least one other person who's had similar issues.

[ststephene]

I went into the engineering screen and changed the radio settings but still no data service on any of my band choices, issue still unresolved.

[21stNow]

Have you tried to go to AT&T's forum and ask there? There isn't a lot of activity in the BlackBerry forum, but there are some AT&T Community Specialists that will look into this for you. If you register for the forum, send a private message to ATTCustomerCare to see if they can help you.