20 Most Recent HTC AT&T Titan PI39100 Mint Cell Phone - Page 7 Questions & Answers

Try removing the sim and cleaning the contacts. Be very careful doing this as you can damage the contacts.

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Via hardware buttons on phone. Power off phone. Press and hold Vol down, press power button until you see bootloader (3 happy androids on skateboards at bottom of page). Release vol down. Select Factory reset, and just go with it.

you can go to setting and then call setting then you can see unblock option you have to inter and unblock your number which one you like https://www.youtube.com/watch?v=h-G8b9-etdk

you have to go to call setting and scroll down and you can see the block number you have enter and unblock your number which number you like to unblock

Back up your information to Google drive via a wireless connection or wifi and then restore the phone to factory default. Once the phone is reset then pull the information back from google drive. After the back up make sure to delete the Google account off the phone before reset or Google 2 step verification could lock you out.

you have to settings and then go to tethering and mobile hotspot and then click on mobile hotspot on activate your data sharing

There a few questions to be asked before an valid reply can be produced. Is your HTC 10 on contract with a cell phone carrier? Meaning did you out right buy the device or did you sign up and receive the phone as part of your cell phone plan? If your phone is paid for and your contract is up then you will need to contact that carrier your phone was on and have them unlock (release your phone) so it can then be used on another network.

Most phones are locked to the carrier they were sold by. You may need to contact the carrier that the phone used to be on and ask them to unlock the phone.