Lately, whenever my iPhone has been on for a while, my data just seems to die. The blue 3G indicator is still showing, but no data transfers - Can't load websites or send iMessages. The only way to fix it is to restart the phone. Neither airplane mode on/off or cellular data on/off toggles work, only a reboot allows data transfers. But the next time I pull my phone out of my pocket to send an iMessage, the problem appears again.
Could this be a software issue, or an MTN issue?
Edit: Right after I posted this, the issue stopped and hasn't reappeared since. Go figure.