Device Guides

Apple iPhone 4

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iOS is the operating system software installed on your iPhone. To find out which version you have: Tap Settings, Tap General, Tap About, and view the version number.
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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.

We found 7 possible causes:

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