Unlock the phone and go to the Main Menu .
A hard reset (also known as a factory reset) will erase ALL your personal data, including contacts, messages, photos, videos, and custom settings. It will restore the phone to its original out-of-the-box state. Back up any important data before proceeding. Method 1: Using the Phone Menu (Software Reset) This is the safest method if your phone is still turning on and responding.
Ensure the phone is turned off . (Remove and reinsert the battery if it's frozen). How to Hard Reset NOKIA 2700 classic
Once you see the logo, release only the Power button . Continue holding the other three keys (Call, *, 3).
Select Restore factory settings .
Scroll to Settings (the wrench icon).
A formatting screen will appear (it may look like a grid or show the word "FORMATTING"). Release all buttons. Unlock the phone and go to the Main Menu
The phone will restart. Once it boots up, it will be as clean as when you first bought it. Method 2: Hard Reset Using Hardware Keys (For Frozen/Unresponsive Phones) Use this method if the phone is frozen, stuck on the Nokia logo, or you have forgotten your security code.
Keep all four buttons held down until the phone vibrates and the Nokia logo appears. Back up any important data before proceeding