Quote:
Originally Posted by TheMadBrewer
One funny thing -- when I first turned on the UM+ upgrade it said "AT&T" as the network name. The new UM+ says "Cingular." At some point the AT&T switched to Cingular and now I can receive SMS's -- probably a coincidence, but who knows 
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What's probably happening here is that it's changed from using one network to the other. Some time ago Cingular (PacBell) sold part of their network in California to T-Mobile. I beleive this network has been running with the old PacBell MNN which may show up on most phones as Cingular. ITMT, Cingular is also running a different network in California with their regular MNN. It's all very confusing because the name comes out of a lookup table in the phone and if the company changes its name (e.g. ATT => Cingular => ATT) the phone does not know about it. OTOH, the name shown for a SIM's home network can be changed by an OTA update.