If you want to reset the ZTE Orange Rio, then follow instructions below. You can try defalt phones codes is 12345 or 00000. Default 4 Digit user code: 1234 or 0000 Default 6 Digit Security code: 123456 or 000000 Display IMEI. Use this to displays your ZTE handset’s IMEI Number. The same code works from all other GSM handsets. Type *#06# “Star, Hash, Zero, Six Hash” on your handsets keypad. Version. Type *983*7469# Battery Temperature. Type *983*1688# Keypad Test. Type *983*5391# Phone Reset / User Code Reset. Type *983*5651# Sim Lock Info. Type *983*757# Master Reset. Type *983*22387# Audio Test. Type *983*2831# Version Info. Type *983*837#