Unique USSD codes you didn't know existed!

Secret Codes for spying
Dangerous codes to dial
Codes to never dial
How to  stop hackers
How to tell who is spying on you
How to divert calls
Can someone hack your calls
How to link calls
How to to divert calls
How to connect phone camera
How to check if your calls are diverted
How to tell if your calls are tapped
How to remove call diversion
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