The Congstar German USSD Codes have been added below and you will note that these USSD codes are very limited and only covers the most basic of services you would find from say the Vodafone USSD codes in Germany or other larger players. Congstar is more in line with the USSD codes for Ring and the USSD codes for Klarmobil which is basic for all intent and purposes.
Congstar German USSD Codes
The Congstar USSD codes are limited to only three options. These are very basic options such as checking your balance, charging your account and displaying your mobile phone number.
|* 100 #||Check account balance|
|* 101 * recharge code #||Charge the account with a prepaid card|
|* 135 #||Display of your own telephone number|