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Request to Transfer My Existing Number to O2

Besucher:in

Dear,

 

I had a mobile contract with WinSim which ended yesterday. Parallelly, I have ordered a new mobile with a tariff from O2.

I would like to keep my original phone number and transfer it to my new O2 contract. Since my old WinSim contract has already ended, could you please guide me on the steps to take in order to retain my number with O2?

 

Thank you for your support.

 

Kind regards,
Rushik
Edit o2_Bianca 25.09.25 08:39Uhr: Moved from Austausch rund um die Community to English o2 Community mobile 

Lösung von o2_Rebecca

Welcome to our community ​@Rushik , thank you for asking here 🌸

I am delighted that you have chosen us as your provider 😊

You can easily request to transfer your phone number to us online in My o2.

To do this, you must first register with the number you now have on your new SIM card. Then go to Manage Contract (Vertrag verwalten), select Number porting (Rufnummernmitnahme) and choose ‘Transfer to o2’ (Zu o2 mitnehmen).

The process takes approximately 8 working days. You will be notified of the exact transfer date by text message and email.

Kind regards, Rebecca

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    3 Antworten

    o2_Rebecca
    • o2_RebeccaModeratorin
    • Moderatorin
    • Lösung
    • September 25, 2025

    Welcome to our community ​@Rushik , thank you for asking here 🌸

    I am delighted that you have chosen us as your provider 😊

    You can easily request to transfer your phone number to us online in My o2.

    To do this, you must first register with the number you now have on your new SIM card. Then go to Manage Contract (Vertrag verwalten), select Number porting (Rufnummernmitnahme) and choose ‘Transfer to o2’ (Zu o2 mitnehmen).

    The process takes approximately 8 working days. You will be notified of the exact transfer date by text message and email.

    Kind regards, Rebecca

    Das passende FAQ für (fast) jede Situation 🤓👉 https://hilfe.o2online.de/knowledge-base
    Besucher:in

    I have the same number from O2 and it did not change the same number from prepaid to postpaid 

    please change the same number in o2 and I did contract for my number is +49xxxxxxxxx this is my permanent number from prepaid to postpaid.
    edit o2_Solveig 12 October 2026, 12:02, personal data 

    o2_Solveig
    • o2_SolveigModeratorin
    • Moderatorin
    • October 12, 2026

    Hello ​@Mohitkumar Devendrakumar Patel ,
    welcome to our o2 Community 😀
    Have you already signed up for the postpaid contract? 
    If so, you can arrange to transfer your number yourself via ‘My o2’. 
    If the contract hasn’t been activated yet, you can apply to transfer your number straight away when you sign up. 
    Kind regards, Solveig 

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