With the service codes (USSD) you can manage several functions of your mobile phone.
Service codes (USSD)
USSD code
Function
*147#
Balance check
*143*1234567812345678#
Recharge credit with a refill card
*109*07xxxxxxxx#
Check if number belongs to TalkTalk Mobile or third party network
*148#
Activate acoustic signal:
Beep sound when you select a mobile number of another mobile provider
#148#
Deactivate acoustic signal:
Beep sound when you select a mobile number of another mobile provider
*145#
Activate Talkbox
*145#
Deactivate Talkbox
*135#
SMS information when abroad with the Roaming tariffs – turn on/off
*125#
Mobile phone configuration
*122#
Show your own mobile phone number
Service codes as PDF.
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