I have a att iphone 5 on straight talks byod sim program. Been using it for about a month now and everything was working great until yesterday. For some reason my iphone says it is connected to data (status bar says 4G), but when i go to safari i get a pop up saying "could not activate cellular data network" and below that it says "you are not subscribed to a cellular data service". Usssaly when data is not working on my phone i just turn cellular data off and back on, but this time the problem persist.things i tried so far is turn on/off cellular data, restart phone, turn on/off airplane mode, and i also when on straight talks website and downloaded the apn settings… All this did nothing. I email straight talk but they are taking to long to respond, i hope to get a faster responce here.
P.S.- everything else (phone and text) is working, just not data