USSD codes for controlling the T-Mobile landline number on the cell phone

Telecom tips from Sir Apfelot
Telecom tips from Sir Apfelot

T-Tips from Sir Apfelot: Helpful instructions for T-Mobile and Telekom customers.

The "Fixed line phone number" option is included in my mobile phone contract with T-Mobile. This allows you to set up a landline number that "arrives" on the cell phone. This is quite useful if, for example, you have a Bluetooth headset like this one at home with the iPhone, but does not have Bluetooth support on the normal phone to use the headset. So you can tell other people this landline number and they can then call me on my cell phone at the "local rate".

The problem was, however, that the settings for the T-Mobile mobile box were very confusing. For example, all callers came to my T-Net box immediately when I was no longer in the "@Home area". A request to the Telekom support hotline resulted in a few helpful phone codes - so-called USSD codes - that you can enter in your mobile phone to query or change certain functions.

USSD codes for the T-Mobile cell phone

I have listed the USSD codes for controlling the landline number here. For my problem with the mobile box, the setting or the code sequence under point 3 is necessary. This means that all callers who call my "landline number" are redirected to my cell phone and not to the mailbox. The diversion to the mobile box is point 4 and the standard setting if you have booked the "landline number option".

These USSD codes can be used to control what should be done with calls to the landline number.

  1. Status query of the @Home area: * 130 #
  2. Status query of the current settings: * 130 * 0 #
  3. Forwarding to your own mobile number: * 130 * 1 #
  4. Forwarding to the mobile box (preset and free of charge): * 130 * 2 #
  5. Absence announcement ?? Participant cannot be reached ??: * 130 * 3 #
  6. Activate / deactivate "Parallel ringing" (only for Family & Friends / Business): * 130 * 4 #
  7. HomePhone: HomePhone mobile box on / off: * 130 * 5 # (either forwarding to HomePhone mobile box or absence announcement)

Answer landline calls on your mobile phone - at no extra cost!

Incidentally, I built the following "constellation" with my Fritz! Box and the landline number:

If someone calls my "normal" office number, a call diversion is set up in the Fritz! Box as a "parallel call" to my T-Mobile landline number. So with every call, not only my landline phone rings in the office but also my cell phone without incurring additional costs for forwarding to my cell phone. If you want to do that too, look in the Fritz! Box under "Telephony" -> "Call handling" -> "Call diversion". There you create a diversion as a "parallel call" and enter your number there, which you received when you activated the option "landline number" in the T-Mobile contract.

Works wonderfully if everything is set up correctly. And don't forget to enter the code from point 3 above directly after activation in the mobile phone. Otherwise your callers often only have their mailbox on them. :)


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  1. MrNo says:

    What pains me most is that calls to the nationwide T-Mobile landline number (aka T-Mobile @ home) cannot be forwarded. For example, to a different landline connection.

    The diversions in the smartphone only affect calls made directly to the T-Mobile cell phone number - anyone who calls the landline number still ends up on the cell phone.

    This is very unpleasant, especially if you come from CO2, where ALL calls were handled according to the set forwarding conditions in the mobile phone - regardless of which of the two numbers the caller originally dialed.

    As a business customer in particular, from time to time you want to switch T-Mobile landline number calls to another connection. The system at D1 has not yet allowed this.

  2. RP says:

    The parallel call runs on me too, but then I don't see the caller's number on the mobile phone, but my home office number.
    Is that the same for you, or how did you get it under control?

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