Mobile Data not working

Hello, I have problem with Mobile Data Internet.

I have bought the SIM card at Rossman and I have activated it through PostIdent Coupon, but my mobile internet is not working now.

I am using Iphone, when I turn on 3G it goes to E.

LTE not working also.

I have been to 3 o2 markets to see if they can fix the problem but I have had no luck.

Also today I made a call to Hotlines o2 but still I couldnt get my Mobile Data internet to work.
Edit o2_Bianca 07.11.24 08:42Uhr: Moved from Mobilfunkdienste to English o2 Community mobile