Some variants of the Nokia 700 may use *#622095# for network reset only, but *#7370# is the universal hard reset code.
and forgot it, you may need professional service tools to unlock the device. Do you also need instructions on how to update the Symbian Belle firmware after the reset? Hard Reset NOKIA 700 22 Jan 2018 — How to Hard Reset NOKIA 700
The Nokia 700 holds a special place in the hearts of mobile enthusiasts. Released in 2011, it was marketed as the "smallest smartphone in the world" at the time. Running on the Symbian Belle operating system, it offered a sturdy build, a ClearBlack AMOLED display, and NFC capabilities that were ahead of its time. Some variants of the Nokia 700 may use
The phone will restart. This takes about 2 minutes. Do not press any buttons until you see the language selection screen. Hard Reset NOKIA 700 22 Jan 2018 —
Keep holding these buttons until the phone vibrates or the Nokia logo appears on the screen.