NTR users often complain about spam or dropped calls. These codes are the best defense.
| Purpose | Example code | Notes | |---|---:|---| | IMEI | #06# | Read-only, safe | | Device test menu (Android) | # #4636# #* | OEM may block | | Samsung test menu | #0 # | Samsung only | | Call forwarding status | *#21# / *#62# / *#67# | Carrier-dependent | | Hide number | *#31# | Carrier-dependent | | USSD balance check | *123# (example) | Varies by carrier/country | ntr phone codes best