A locked SIM occurs when you enter an incorrect PIN code at least 3 times followed by an incorrect PUK at least 10 times. After that the SIM needs replaced. If it happens with another SIM in the future, call customer care as the PUK code is dependant on your SIM card. Read entire answer

Short answer: Yes Long answer: DSL is internet over traditional phone lines whereas U-Verse is internet over fiberoptic cable. Since the technonogies are different, Yes. Read entire answer

Your phone number @txt.att.net or @mms.att.net. Pictures should be sent to the second. Read entire answer

Answer tones are only bill to mobile. You can remove your purchase blocker long enough to make the purchase and re-add it. In addition, you can electronically pay the amount to your account to counterbalance the charge on next month's bill. Also,... Read entire answer

The subsidy unlock code for that phone can be obtained by calling customer care and requesting it. That phone is certainly out of exclusivity. Read entire answer

What device is it and is it postpaid or prepaid? Read entire answer

I agree with the other answer, but must add that you can always use the "new" SIM that was to go into the new phone into your old phone so that you can make and receive calls. If your pre-upgrade phone is... Read entire answer

If you are postpaid and have your online account setup, you can go to www.att.com/transferservice and start the process of transferring your line to her account. Read entire answer

If you turn location services off on your phone, Family Map will default to a cellular triangulation method over the aGPS method used. In other words, the location will not be as accurate, but will still be able to be found. Read entire answer

WWW.ATT.com/Myatt for all your online account management for all AT&T services. Read entire answer