AT&T Cell Phones - Page 3 - Popular Questions, Answers, Tips & Manuals

We would not have that info here, sorry.

have you taken the battery out and reinstalled. usually resolves these type of problems. hope this helps

I need the make and the model # of the phone, "cheapest phone" will not get the info you require. All info is under the battery.

Here is two possibility either you used sim in wrong slot like you have nano sim and you used into micro sim slot or other different slot. or your mobile is sim locked and that is why it not accepting at&t sim. here is how to unlock at&t simcard. As your att sim working fine with blackberry so sim is fine no issue with sim card. on which mobile you have tried this sim as you have not mentioned your other mobile it is same as blackberry or apple or samsung mobile.

Hi @Benjmain Brink , please perform a factory reset on the phone. Please be advised that by doing a factory reset will wipe out all files on your phone. Hope this helps!

If you hung up they are gone and are unrecoverable

very possible that the account has not be paid up or the prepaid has run out

If it unlocked then how it got locked. with which sim card your mobile locked at&t or tmobile. You said you have unlocked mobile does it roaming lock or sim locked. it may possible that your mobile was temporary unlocked on the basis of roaming otherwise your mobile is sim locked. To unlock your at&t or tmobile smartphone you need to generate unlock code from imei number of your mobile phone. it will generate four kind of unlock code. if your mobile is hard locked then use defreeze code otherwise use nck code. here is how to unlock at&t sim for lg samsung nokia mobile at united states of america , canada and uk.

www.att.com ZTE_Maven_2_Z831.pdf user guide or www.att.com Device Support Tutorial for ZTE Maven 2 (Z831) Im sorry cant get more specific then this, answer depends on the type of service (example prepaid).

I suggest you can approach Theunlockarena.com and specify the country,locked network of ZTE Zmax Pro .You can get the permanent unlock service along with free instructions.

The best place to get these settings is from your service provider. Call up on their customer care hotline and ask. They'll send an SMS containing the settings.

Contact customer care and also send email to them. Ask to change your number to new number. or you can also port your at&t number to streightalk. here is how to unlock at&t mobile . How to Network Unlock Att Mobile

Make Sure your phone asking for unlock code and use the following steps to unlock it. visit https://www.unlockninja.com/ Select: Brand Name Select: Model No and click unlock button on the next page proceed the steps below: 1) select purchase country and network on which device is locked, your mail 2) We will send you login details(Username and Password) for unlockninja.com at the same moment in your mail to update IMEI No 3) Make login and Update IMEI, we will deliver you the code in The least possible time

It looks like your loud speaker is burnt off/set to off or anything problematic related to your loud speaker. I'd suggest you to get it repaired by a skilled personnel

Make Sure your Phone is asking for unlock code with a AT&T Sim to unlock this if yes then apply here to get the unlock code. unlockninja.com

Did you purchase this phone yourself?

What is the question?

nice to know most service providers only allow 3

You need to do a factory hard reset.

you will find the answer here http://www.braingle.com/brainteasers/1416/the-king-and-the-poison.html