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Switch to O2 Starter Flex from M Boost plan after contract period


Hi, I’ve been an O2 Mobile M Boost Online (that’s 50GB+ monthly) customer for the past couple of years, and my contract is due to end in a few days. Since I don’t use the phone internet much at all, I’d like to switch to the O2 Mobile Starter Flex plan (which is 2GB, monthly cancellable) and carry the same number. How can I do so? When I try to switch my contract online (via Mein O2), it shows only the more expensive plans to me. Thanks for your assistance.

Lösung von Bumer

The Starter Flex isn't prepaid. Yes, I would order it now, otherwise the transfer won't work overnight.

You order the Starter Flex and activate it after receiving the SIM card. A new number will be activated for you first. Then you can submit the form. Your old phone number will be transferred from the o2 Mobile M Boost to the Starter Flex on the cancellation date.

12 Antworten

Bumer
Legende
  • July 3, 2025

A direct switch isn't possible. You would have to reorder the o2 Mobile Starter Flex and cancel the o2 Mobile M Boost. Please bring your phone number with you on this form: internal porting Form Switching time after the end of your contract. The o2 Mobile Starter Flex costs €9.99 after canceling your old plan.


o2_Kathi
  • Moderatorin
  • July 3, 2025

Good morning ​@MessageActor,

welcome to our community. I'm glad you're here 🤗

I'm delighted that you want to stay with us and that you're here to find out more. Bumer was able to help you quickly and provide you with information about our o2 Mobile Starter Flex tariff.

Would you like to order the new contract and take your phone number with you?

Edit: Tariff designation changed


  • Autor
  • Besucher:in
  • July 3, 2025

Hi, I was on my way to cancel the M contract, to later switch to the Flex plan. But yes, I’d like to order the new prepaid contract and take my phone number. If there is an easier / more automatic way to do this, it would be great. 🙂 Thanks for the assistance.


  • Autor
  • Besucher:in
  • July 3, 2025

I just ordered a cancellation of my previous contract. Since I guess it would take a month for the termination to go in effect, ​@Bumer could you please suggest if I should buy the prepaid SIM now or after the termination & should I apply for the number porting now or after termination / after I have the prepaid SIM (I ask because I guess the prepaid SIM would come with its own number, and then for a while I’d have two… it’s a bit confusing). Thanks for your assistance.


Bumer
Legende
  • Lösung
  • July 3, 2025

The Starter Flex isn't prepaid. Yes, I would order it now, otherwise the transfer won't work overnight.

You order the Starter Flex and activate it after receiving the SIM card. A new number will be activated for you first. Then you can submit the form. Your old phone number will be transferred from the o2 Mobile M Boost to the Starter Flex on the cancellation date.


Bumer
Legende
  • July 3, 2025

@o2_Kathi 

o2 *Mobile* Starter Flex. *Free* is no longer available for booking. 😉


o2_Kathi
  • Moderatorin
  • July 3, 2025

@MessageActor Sorry, I accidentally used the outdated tariff name 😀

I'm very pleased that Bumer was able to help you so quickly and effectively. Did you get all the information you needed to switch?


  • Autor
  • Besucher:in
  • July 3, 2025

I think so. I cancelled my current contract (ends on 07.08.), and bought a new Starter Flex set to be activated on 01.08. I’ll apply for the number carryforward then. Hopefully one week should be enough to make sure the number is carried forward right after my current contract ends.


Bumer
Legende
  • July 3, 2025

The number portability will probably take place on August 8th and the o2 Mobile M Boost will run for a day longer.


  • Autor
  • Besucher:in
  • August 1, 2025

Hello, the day has come and I intend to submit the internal forwarding form. Just one question (which I didn’t pay attention to but has become apparent from an email),
@Bumer you wrote above “The o2 Mobile Starter Flex costs €9.99 after canceling your old plan.”, whereas being an o2 customer, I was expecting a charge of €4.99 a month. So, is it that when I cancel my previous number, this discount for an o2 customer doesn’t apply?


Bumer
Legende
  • August 1, 2025

You can only receive a combination benefit if a corresponding donor contract [2nd contract] is in place.


o2_Gerrit
  • Moderator
  • August 2, 2025

Hello ​@MessageActor,

yes, Bumer already gave you the answer, with the Starter Flex alone the discount is not possible.

Keep us updated here about the portring of your number if you like 🙂

Best Regards,

Gerrit