My iPhone 4s has been very tempremental with making calls and sending SMS. It seems to work better if my 3G is on all the time. Anyone else experiencing this?

My iPhone 4s is very tempremental. One day it's fine, the next I find it hasn't recieved calls or texts that have been sent to me and it won't make calls or send texts either! I've found that if 3G is turned on it seems to help but do I really need to have 3G on all the time?

How are you turning off 3G? If you are putting it in Airplane mode this is why you haven't received any calls or texts, they both run on voice data which you turned off.

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