This thread's discussion is locked. If it doesn't give you the information you need, head to its forum board for active discussions or to start a new discussion.
Verify under Settings>Carrier>Wait a moment to see if it can find any network carrier and either select Automatic or Telus. Try Settings>General>Reset>Reset Network Settings. It won't delete anything except your wifi passwords. If that doesn't work, remove your sim, press and hold power+home button until the apple logo reappears, then wait for it to power back on and place your sim back in. If that still doesn't work, than you might be having a device issue. Best would be to test your sim into another phone or another sim into your phone. You can go to any Telus or Apple store for assistance.