Serious Signal Issue

[savedline]

I have serious signal issues at home, I cannot recive call or make calls when at home. Even when I move around around the flat I can be lucky to have one bar signal strenght, even when there is signal, calls will not come through. No matter time of the day. 
I had this issue for months cannot even make a phone call. 
data is terrible.

[MI5]

@savedline 

You could try wifi calling https://www.o2.co.uk/connectivity/wifi-and-4g-calling

Some help on indoor coverage here Guide: Do you have poor coverage / signal Indoors? This may help Explain / resolve it 

[Bambino]

@savedline See if anything in these guides can help:

Why do I have poor coverage indoors? (o2.co.uk)

How can I sort out my network issues? - o2uk

Do you have a phone capable of WiFi calling? If not, you should consider getting one: 

Wifi and 4G Calling explained | O2