Device Guides

I can't make voice calls

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

HTC One (M8)
HTC One (M8)

We found 10 possible causes:

  1. You've turned on manual network selection and are out of range of the selected network
  2. Flight mode is turned on
  3. No credit on your prepaid phone card
  4. You number has been suspended due to non-payment
  5. Your mobile phone is set to connect to 3G networks only
  6. There may be a temporary network problem
  7. There's an error at the receiving end
  8. Poor or no network coverage
  9. You're abroad and roaming isn't included in your rate plan
  10. Fixed dialing is turned on
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