You may be unable to receive text messages from contacts who use iPhones.

If you've just migrated your contacts from iPhone to your HTC phone, your contacts may still be texting you through iMessage service and not through SMS or MMS. To receive their text messages on your HTC phone follow these steps:

1. Turn off the iMessage service in your iPhone settings.
   If you have other Apple devices, you also need to turn off iMessage on them also.
2. Go to your Apple support profile on the web and unregister your iPhone and other Apple devices.

If the issue persists, contact Apple for support.