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You have to enter a code on the keyboard to maste reset or factory reset it.
This is the code --> *2767*3855#
After entering it, follow the instructions to factory reset. Remember, this will erase everything from the phone.
Let me know how it goes.
Please don't post new questions, instead please reply here. You can remove the remove the SIM before resetting it. If the contacts are saved on SIM, then you will not lose anything.
Remove the SIM card and do you see the contacts on the phone ?