Call drop after a few second

[SabSE]

I have been calling Lloyds early this afternoon and Medical center just now  and the calls drop. It keeps happening no matter how many time I call! Can you please fix this as I cannot have the conversation I need 

[Enlli]

I'm sorry, but we are all customers here

You could try looking at these

Guide: How can I sort out my network issues? 

Guide: Is the network down for me or everyone? 

[Arasheed]

O2 probably doesn't have good coverage in your area (use https://status.o2.co.uk/) or check if the sim is faulty And replace it in a store (bring an ID with you).

[Bambino]

@SabSE If you have a compatible phone you can try using WiFi calling: Wifi and 4G Calling explained | O2