Bad idea to enter 100 possible codes everyday. You will never get there. After about 10 tries I was locked out and needed the PUK code. I got that from the carrier and was back to phone lock code. After A few tries, I fried the SIM card which will require me to buy a new SIM now. Luckily, I put an old SIM in the phone and recovered all the contacts since those were stored on the phone (good idea!). Some else I found out accidentally...I put the so-called fried SIM in another phone and now I am back to the phone code. I have a second chance now and I don't want to blow that until I know for sure what I need to do