Device Help HTC One Calls and voicemail
HTC One

HTC One

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Diverting calls to another number

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Reading MMS

Setting up my mobile phone for SMS

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Getting started

Basic functions

Calls and voicemail

Messaging

Apps and media

Connectivity

I can't make voice calls

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If you can't make voice calls, follow these instructions to solve the problem.
We found 8 possible solutions to your problem. Click Start guide to see the solutions.
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There may be a temporary network problem
Your mobile phone is set to connect to 4G networks only
You number has been suspended due to non-payment
You're abroad and roaming isn't included in your rate plan
You've turned on manual network selection and are out of range of the selected network
Flight mode is turned on
No credit on your prepaid card
There's an error at the receiving end

Video guides

Issue: Slow WiFi on Android Issue: Slow Mobile Internet on Android Issue: Can't Use Mobile Data with Android Issue: Can't Connect to WiFi with Android Issue: Can't Make or Receive Calls with Android

Media guides

Clean up and Speed up your Smartphone Can't make or receive calls from your Smartphone? Can't use mobile data on your Smartphone? Can't connect to WiFi on your Smartphone? Slow mobile internet on your Smartphone? Slow WiFi connection on your Smartphone? Keeping your Smartphone Safe