I have a package with 3G and they charge by the hours, not MB
for some reasons I am limited to 10 hours on 3G, but I have another 10 hours on GPRS/EDGE
what is the difference between those 2 modes ? speed only ? availability ?
what if I run out of 3G hours, will my iPhone switch automatically to GPRS/EDGE ? is there a manual option on the iPhone ? or is it automatic ?


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