Hi team,
My location is XXXXXXXXXX 12247, Berlin.
My mobile internet fluctuates a lot and gets disconnected every 10-15mins. I am new to this area and this is happening to my partner's mobile(O2 user) as well. Can you please look into the issue?
Regards,
Edit o2_Sven: Moved thread to English o2 Community: Mobile, removed exact location
Hello
welcome to our o2 Community 
I'm sorry you're having trouble with mobile internet. We currently have no reported impairments at your address. You can check this under this link: Live Check. If there are still problems, you can report them using the feedback button.
Best regards
Giulia
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