• *#06#International Mobile Equipment Identity.
• *#7780# To check the factory settings restored.
• *#67705646# To get rid of the operator logo.
• *#2820# To check the address of your Bluetooth device.
• *#746085685# To check the SIM clock status.
• *#30# View private number.nokia5700
• *#0000#To show software version.
• *#4720#To activate the Half Rate Codex and double capacity for voice traffic.
• *#4720* To deactivate it.
• *3370#To activate Enhanced Full Rate Codec.
• #3370# To deactivate Enhanced Full Rate Codec.
• *#61# To check the number where “On No Reply” calls are diverting.
• *#7760# To check the manufactures code *#7760#.
• To check out the Provider Lock Status #pw+1234567890+1#.
• To check the Network Lock Status: #pw+1234567890+2#.
• To check the Country Lock Status: #pw+1234567890+3#.
• To check the SIM Card Lock Status: #pw+1234567890+4#.
• #73#T ry to reset phone timers and game scores.
• *#43#To check the call waiting status of your phone.