1. Enter *#92702689# in standby mode to query the current total call time, which must be greater than 1 minute.

In addition, not all software versions support this command.

2. Identify the refurbished machine

First use *#06# to check the serial number, which should be consistent with the serial number on the back of the fuselage. Use *well 92702689 to view call times. Then also pay attention to see if there are any marks on the screen, data cable, headphone hole, speaker hole, and strap hole; see if there are any scratches on the battery lock of the fuselage ~~ Check the WAP and voice functions and call record information function Check whether there are any records in the SIM card contact points, and whether there are wear marks on the battery contact points of the fuselage; check whether the gaps at the seams of the shell are even and below 1MM, whether there are pry marks, and check the elasticity of the buttons and the brightness of the internal and external displays. ; Carefully check whether the fixing screws of the fuselage are rotated, painted and inked, and whether there are pry marks on the trademark. Then check whether the business card folder and communication records in the mobile phone are empty, test the call quality, etc.

In addition, this command can generally be used on NOKIA mobile phones