For GSM phone (AT&T, T-Mobile etc):
- Insert a sim card from a different carrier
- Turn on the HTC phone. If the phone is locked, it will prompt you with "Network is locked, please input unlock code"
For CDMA phone (Verizon, Sprint etc):
- Turn off the phone
- Hold down the Volume Down + Power keys. It will show the flash screen
- It should say "SPL-0.57 Cmonex" if the phone is unlocked
Thanks for sharing such a useful information.I used it to check and found that my HTC phone was locked.Since I had to switch simcards I unlocked it using the unlock code from Simpleunlocking.com and removed the network restriction permanently.
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