How to make an iPhone receive a GSM signal over WiFi

Question

iPhone

Surprisingly, but the fact is that the quality of cellular coverage in the United Kingdom is much worse than in Russia, even in the center of London.
In the office, the telepon constantly loses signal. But there is WiFi. Is it possible to somehow teach the iPhone to receive all the necessary GSM (calls, SMS, etc.) via WiFi? Let him go by IP somewhere to the server of the mobile operator. Does it happen?

Answer 1

The only thing that theoretically can help you is a femocell. But here I have no idea whether your operators provide them.
Also, if the operator has a SIP number service, then the voice can be sent through the SIP client.
Nashamanit something that would emulate a SIM card through the Internet at the moment is impossible.

Answer 2

The simplest is the unconditional forwarding of all calls to Skype or sip number. True, I don’t know what will happen with SMS, plus some operators simply don’t forward them.

Answer 3

It probably depends on the operator.
In my US, T-Mobile allows calls/SMS over WI-FI. But for this you need a phone with firmware that has all this functionality. It is called WI-FI Calling.
Here are the details:
t-mobile-coverage.t-mobile.com/4g-wireless-broadband-service
I tried it - it works, but the battery runs out faster, so I didn’t actively use it.
I don't know if anyone else has it.

Answer 4

If it is not possible to install a femtocell, then you can buy a small repeater (repeater) for the standard you need. Searched in any search engine. This is provided that there is still communication outside the premises. I don't know about the legality of use in your country.