How do I turn on WiFi calling

[Dazza27]

I had WiFi calling on my Experia 5 but after the latest system update crashed my phone I have lost WiFi calling due to doing a factory reset.

Any ideas how to re-activate this feature. Thanks in advance for any advice given.

[RottenFoxBreath]

It's usually granted by your service provider, for example, in the UK, you need to have a phone running o2's software, and bought from them to gain access to it.

Maybe remove the sim card, and try again, or contact your provider.

[Jrnr]

Ok basically a factory reset will bring the option as long as you have a WiFi call capable SIM card inside.

If not still there is a rare chance... 

1 Remove the SIM, let the device restart completely and wait for a couple of minutes before you unlock the phone.

2 insert a SIM card from a different network

Let it restart and optimize for the new SIM.

3 Now repeat step 1

4 insert the SIM card you want to use , and then the phone will restart and bring the WiFi calls back.