For the above MVNO, which uses AT&T's towers,
I transferred my SIM card from a Samsung 2G phone
to an unlocked GSM iPhone 3GS.
I followed the instructions on this web page,
for Iphone General Settings for Data Configuration:
I'm still unable to get Cellular Data to work on this phone,
even though I have Cellular Data and Enable 3G set to On in Settings.
The upper-left-hand of my screen shows 5 bars,
the words "Jolt Mobile," a blank space, and then the current time.
I tried calling Jolt Mobile to resolve the issue,
but they're not sure what the problem is, either.
Is there anyone who can help out, please?