Secrets and tricks for gsm cellphone

• *43# to activate call waiting, to deactivate #43#.
• Type *#61# and press call - Check call redirection status.
• Cancel all redirections: ##002#
• Enable conference calls type: **43#( youcan make up to 7 calls at once)
• For outgoing call barring dial *33*barcode*# and pres OK.
• For deactivate it dial #33#barcode*#.
• If you need to block SMS receptions *35*xxxx*16# xxxx is your Call barring code (default is 0000).
• To remove this barring : #35*xxxx#
• When the sim card pin blocked type: **042*pin2 old*newpin2*newpin2*
• Typing *0# or *nm# on the beginning of a txt message gives you detailed delivery report on some networks.
• If you want to hide/show your phone number when calling(*#30# / *#31# or *31# / #31#) Works on some networks.