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1and1: the number portability works

  • Oct 23, 2025
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Number portability is already long nothing more and also 1and1 this Service offers. As you must do if you want to take your old number with 1and1, you will learn in this practical tip.

Number portability: How to port your number at 1and1

In principle, you have to worry about hardly anything, if you want to take your existing number to a new provider. In General, the new mobile provider takes care of all formalities for you. In the case of 1and1, this is also the case.
  • You are not yet a customer at 1and1, you can apply for the number portability during the ordering process. It is important that the data that you specify in the form for the number porting at 1and1, match exactly with the data that you have stored with your current mobile service provider.
  • A number portability during the entire term of the contract at 1and1 possible. Therefore, can you porting a number later in case the 1und1 Hotline make. The service team can be reached Monday to Saturday from 8:00 to 20:00 under the phone number 02602 - 969 721.
  • Alternatively, you can request the number porting on the Control Center. Here, select the "settings and Services" the Option "number to take".
  • You will receive the number portability a new SIM card, if you do not have any SIM card from 1and1. The ported telephone number will be transferred automatically when the process is complete. Until then, you can use with your new phone number from 1and1 on the phone and the new contract anyway.
  • Tip: if you Want to an internal number portability at 1and1 to make, there is a separate form.
Number take to 1&1
You want your Domain to 1&1 to take, you need to proceed similarly.

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