Had you already registered your phone number for Mein o2 before you lost your sim card?
If so, you can order a replacement card there.

https://www.o2online.de/ecare-prepaid/sim-bestellen

I used before lost login with SMS to manage my account in Mein o2 not with complete registering .

I don’t have access to my main Email as it has two authentication with my SIM number and Ilost my phone too.

When I clicking on this link you sent it redirect to home page of O2. this o2 account I log in with not connected to my SIM number, just I register here yesterday with a new email to asking my question.

Please let me know if needs to provide any document for identification for doing the job here.

Edit o2_Cora 22.02.24: Quote removed

Just one solution comes to my mind transferring the number to another operator as prepaid and returning to O2 at a time to keep the number prepaid without forcing you to learn the german language for talking with customer service and defect of customer service for prepaid in English.
please tell me if you have a better solution you have for it!

Maybe someone from o2 can help you. Wait here for further help.

Hello @Momocho, welcome at our community.

I'm sorry you haven't been helped yet but I am happy to help you now.

In general, the easiest way to get a new card is by a shop.

Do you have another shop near you, where you can ask for a new card?

We can send you a new card. Please send us a PN at @o2_Support 

Kind regards, Ines.

Edit o2_Ines. 12.02./13.14 Uhr

You can't get a replacement card for a prepaid SIM in a shop!

Thank you tearsbeforecrying.

But in the past it worked, or am I so wrong right now?

At least not for the last 6-7 years.
You can send him one directly.

Great! @o2_Ines Thank you so much for helping, I applied for following you to be possible sending PN

@o2_Ines I getting this message when I want to send PM to you "Dieser Benutzer kann nur Privatnachrichten von Benutzern empfangen, denen er/sie folgt"
I pressed "folgt" and probably you need to accept my follow then I'll able to send a message privately

Hi @Momocho, yes you are right. I have to follow you. Tahnk you very much for your patience.

Its done and you can write us now.

Kind regards, Ines.

@Momocho :

You try to send a message to @o2_Support or to @o2_Ines ?

Thank you, I try @o2_Support as you mentioned and now I can send message there. also now I pressed "folgt" for yours @o2_Ines if needs I sending my message there let me know

@o2_InesI did request to  @o2_Support  by PN let me know if needed to provide any other document, Thanks!

Hi @Momocho , just a quick check-in 

Have you recieved your replacement SIM by now?

If so, i advise you to complete the registration for Mein O2 as well, so you have more control over your prepaid card, it’s packs, etc.

Kind regards, Rebecca

Beitrag abgetrennt und mit anderen des Users zusammengeführt.

Hi o2_Rebecca ,

I lost my simcard and i don’t have the password to login to the app. I am a prepaid user for my other O2 number. I need to port that number from O2 to other operator. can you please help me in this. What should i do.

br,
tahir masood 

Hello @tahir696, 

I have already answered you in your other post. So, let's stay there: 

lost sim card prepaid need to port my number to another operator. | O₂ Community (o2online.de)

Best regards 
Cora