Please read the instructions bellow if need help to insert the unlock code for a HTC mobile phone or have problems while inserting it

HTC unlock code instructions:

A. General instructions

Make sure "Airplane Mode" and "Wi-Fi" is turned off under wireless connections if your HTC is an Android device.

Please turn off the phone, insert an SIM card from a different carrier in your phone, turn on and when asked to insert the network unlock code/pin, then your HTC is unlocked.

B.Specific instructions

-HTC CDMA phones locked to Telus, Verizon etc

1. Switch to GSM mode
2. Go to Personal> Security
3. It will says "Please enter the sim unlock code to disable the SIM lock"
4. Enter unlock code.
5. Reboot.

-Verizon Incredible Droids(If No prompt to enter code)

1.Go to Settings > Security > Disable SIM card lock ,

2.Input the Unlock Code received

3.Reboot and you phone is unlocked

HTC troubleshooting instructions:

Your htc phone displays "Code Error" or "Sim Network Unlock Unsuccessful" after inserting the unlock code

Never enter more than once the htc unlock code,if you know you written it correctly but was not accepted.

Normally you should have verified if the phone network is not supported because has changed the htc factory unlock codes, if the code is not accepted that can be one of the reasons,here is the list with networks that changed the factory codes Unsupported Networks

If the code is not accepted do a factory reset and try to reinsert it.If you have a custom firmware that might be the cause why is not accepted so should restore to stock firmware and try again.

The HTC device asks for  “Sim PIN”  or “PUK”

Those are codes specific to your SIM card and should be written on your SIM package if is a new SIM.The SIM pin is either set by the Sim owner or if is a new card should be written on the SIM instructions papers. For most Sim cards the default PIN is either 0000 or 1234 ,but you only have 3 tries so would recommend to try finding the exact Pin before trying those.If asks for PUK you can find it by calling to your carrier support or look on the original SIM package.

Your HTC asks for  “Phone Password”/"Security Pin"/"User code" or other user lock like pattern lock/Gmail account

Most likely your HTC has a user lock. To be sure that’s the problem turn on the phone without a SIM inside or with the original SIM. If asks the same thing then for sure the user lock is the problem.  The fix for this is a hardreset. To do a hard reset on android phones go in “Recovery mode” by turning the phone off then holding in same time “Home”, “Power” and “Vol  up” buttons, then select “Wipe data/Factory reset”

After turning on your HTC smartphone with the new sim inside it displays "No SIM"

It means the HTC mobile cannot detect the sim card at all.Most usual reason is that the SIM card is not inserted correctly, so verify what’s the right way to insert the SIM card and reinsert it.If you still you get the same message there may be a problem with your SIM card, either SIM is broken or not supported by the phone at all , so verify if you get the same message with other SIM  card or there might be a problem with the sim card reader.

The HTC phone accepted the code but still displays "No service"

This can be caused by many things, here are the most common reasons :

-The SIM card is not registered, not activated or not supported by the phone. So should either try with other SIM or should verify to see if this SIM works in another phone to exclude this possible issue
-Your phone can be blacklisted because was declared lost/stolen or for not played contract. To verify if that’s the problem try with the original sim to see if works or contact the network help service. If phone works fine with the original SIM than this is not the problem
-A settings or firmware problem. Can fix that by selecting the network manually ,doing a factory reset, update or firmware restore
-The phone has a hardware problem. If any of the above fixes does not work your phone may have a hardware problem and should send it for repairs, hopefully using the warranty if still available