SIM Unlock O2 Diamond2 (HTC Topaz) 
Remote unlock code by IMEI with no technical knowledge required.
After you purchase the O2 Diamond2 unlock code you will be able to SIM-unlock it easily and use it with whatever SIM card from other network carriers you want. Unlocking your phone remotely by IMEI requires no cables or software. Once the mobile phone is unlocked, you can start using it on any cellular network worldwide without any restrictions.
Instructions
Please make sure that you supply us with the correct IMEI number. The IMEI number consists of a 15 or 17 digit number found by dialing *#06# on your mobile phone or you can read it on a sticker under the battery. We only need the first 15 digits.
Place your order using the form above, your unlock code and easy to follow instructions will be sent to the email address you provide on the secure payment system. Unlock codes are usually dispatched within 1 hour, however in some cases it can take up to 3 days. You can check your order and processing time through our order tracking page, and you will also be informed by email as soon as the unlock code is available.
You then simply use your phone's keypad to enter the unlock code we will provide and your phone is SIM unlocked!
