Device Guides

Apple iPhone 4

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How to
Troubleshoot
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I can't make calls on my mobile phone

This troubleshooting guide will take you through a number of possible causes to help you find a solution to your problem.

Apple iPhone 4 (iOS4)
Apple iPhone 4 (iOS4)

We found 7 possible causes:

  1. There may be a temporary network problem
  2. You've turned on manual network selection and are out of range of the selected network
  3. Your number is suspended due to non-payment
  4. There's little or no network coverage
  5. There's an error at the receiving end
  6. There's no credit on your Prepaid Service
  7. Flight mode is turned on
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