The customer's phone hangs up during calls, making it difficult to communicate.

If you can give me the number of the person that sold the phone to you, I would like to call him and try to arrange a solution for you.

If you can find his number, let's have a conversation.

I can help you with that. Unfortunately, we are not physically located in the UK, so it's very hard for us to assist you directly. The phone may be defective, and there's nothing you can actually do in the settings to fix it immediately.