100 Guaranteed to Permanently Unlock | 1-800-707-9807 | Unlock HTC Vivid | How to Unlock At&t HTC Vivid 4G LTE by Unlock code Instructions & Guidebr br This is How to Unlock HTC Vivid from Networks such as At&t and other Carriers.br br There is no Rooting or Software involved in this process. Once unlocked, your At&t HTC Vivid 4G device, it will be permanently unlocked and open to use on other GSM carriers even after updating the firmware.br br HTC Vivid Unlocking Instructions Unlock Code Inputbr br 1. Turn on phone with a foreign simcardbr 2. Phone will display "Sim network unlock pin"br 3. Enter 8 digit Unlock codebr 4. Your phone is unlocked!br br If you don't have your 8 Digit HTC Vivid Unlock Code Yetbr br br If you have any questions, please contact our support team toll free at 1-800-707-9807 or email us at sales@cellphoneunlock.