1. you need to use correct D500 cable
2. connect without battery
3. press unlock
4. press info to see the key M number
5. disconnect cable, insert sim, connect battery, turn phone on and enter key M number. Phone should now be unlocked
Originally Posted by UnlockingExpert
when I am connecting battery to the phone (D500) its show me USB Charging Not Available can some one help to sort out this problem.