Customer's Rule....I'll prove it!
The easiest/sure fire way to update with local towers is to turn your phone completely off for at least 1 full minute, and power it back on and the radio inside should search for the local towers automatically.
I worked for at&t both english and spanish customers in wirless and uverse and other home services as a...
the phone its supposed to do that automaticly but yes you can shut it off and then back on after a cuple of minutes
you can also check out att device tutorials here select apple then your device iphone 4 then you will get the whole list of tuturials and how to here...
hope it helps to ask questions directly with me you can go here
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