Missing customer number in transfer

Which IBAN did you transfer the money to and what did you specify as the payment reference?

I transferred to Telenica Germany, DE 16 7002 0270 0005 7131 53, I think I did left it blank. 

Then it couldn't be assigned! Have a friend who speaks good German call for you. They can search for the payment and assign it.

Ok, understood. That's the only fastest way.
Thanks

Hello ​@Thanapon 

Welcome to the o2 Community. We're glad you're here.
It's more than annoying that you didn't include your customer number with the transfer. It's nice to see that Bumer has already given you the relevant information and advice here. I can only agree with that. The relevant department will then check where the payment has gone and can then arrange for it to be allocated.😊

Best regards
Daniela

Hello Daniela,

In addition, I have paid for the rest of balances with assigning my number since 5 days ago. However, I am still not able to call or access the internet. My daily seems like a blind.

Does it need to be fully pay before returning to normal condition or it should be work now?

And what can I do to access them temporarily?

Your customer account needs to be balanced for it to work again. Check your customer portal under Invoices/Annual Summary to see what it says there.

Good morning ​@Thanapon 👋

I just checked your customer account. We received a payment from you on February 5. Please take a look at your invoice dated January 29, 2026, where you can see the amount due. There is still an outstanding balance, which is why your SIM card has not yet been unlocked. Have you transferred this amount to us in the meantime?

​@o2_Kathi  Yes, I transfered all credited amount. But one of them has not been assigned, it paid 61.97 by 22 November. Is it possible for you to inform to the billing department? Or I have to find who know German and talk by myself.

Yes, you can only clarify that with the billing department.

089 78 79 79 456 

https://www.o2.de/mahnwesen-chat

Mon-Fri 8am-6pm.

Hello ​@Thanapon,
Bumer has already given you the right contact person here. Have you already gotten in touch with the billing department team?
Kind regards, Bianca