I can't connect to the internet unless it's thru a wifi connection. Just started having this problem yesterday, 10/19/2014.
There could be an outage in your area. One thing you could try is resetting your SIM card, i.e., turn off the phone, remove the SIM card (be careful not to touch the gold contacts), wait a minute or two, then reinsert the SIM card, turn the phone back on, and allow it time to establish a fresh network connection.
