GSM Secret Codes

Type *#61# and press call - Check redirection status.Cancel all redirections:##002# *43# to activate call waiting, to deactivate #43#. If your phone doesn't have incoming call barring and outgoing call barring, you can try this. For outgoing call barring dial *33*barcode*# and pres OK.To deactivate it dial #33#barcode*#. On any phone on any network type in **43# to enable conference calls. You can make up to 7 calls at onceIf you need to block SMS reception (if you are spammed by someone)...

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