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Level 1: Joiner
Posts: 9
Registered: ‎11-09-2013
Accepted Solution

Wifi Calling

Hi,

 

I am thinking about purchasing a used Galaxy S9 plus.

 

Having poor reception at home, I need to have wifi calling working.

 

I had to replace my previous (unlocked from Vodafone) Galaxy S7 Edge and had to get an O2 Galaxy S7 Edge to get wifi calling working.

 

Have things changed, or will I need an O2 version of the Galaxy S9 Plus to get wifi calling working or would any unlocked S9 Plus work?

 

Thanks

 

 

Posts: 67,068
Topics: 662
Registered: ‎14-01-2013

Re: Wifi Calling

Hi @Sinkers 

To get 4G and WiFi calling your phone should be running O2 firmware. So if you buy from O2 you will be fine.

Info in this link

https://www.o2.co.uk/business/support/network-support/wifi-and-4g-calling#Samsung-set-up

*The Game Is On*


Level 1: Joiner
Posts: 9
Registered: ‎11-09-2013

Re: Wifi Calling

Thanks for your quick reply.

 

I guess my question really is, can I buy a 2nd hand non O2 phone (unlocked) and will that work with wifi calling, or does it need to have the original O2 firmware on it. Indeed can one flash O2 firmware onto a non O2 phone to make it compatible with wifi calling with O2?

 

Regards

Posts: 67,068
Topics: 662
Registered: ‎14-01-2013

Re: Wifi Calling

@Sinkers 

A second hand non O2 phone won't work with wifi calling.

With regards flashing to get the right firmware, that has been hit and miss from what I've read.

ie it SHOULD work but some people have had issues.

*The Game Is On*


Level 1: Joiner
Posts: 9
Registered: ‎11-09-2013

Re: Wifi Calling

Many thanks for that

Posts: 85,749
Topics: 522
Solutions: 10,718
Registered: ‎04-04-2012

Re: Wifi Calling

@Sinkers wifi calling will work on any S9 regardless of firmware.

I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone7 (EE)
Posts: 67,068
Topics: 662
Registered: ‎14-01-2013

Re: Wifi Calling


@MI5 wrote:

@Sinkers wifi calling will work on any S9 regardless of firmware.


Well if that's the case, that's a mistake on my part. I've read a few posts on here before I answered which claimed it didn't.

*The Game Is On*


Posts: 85,749
Topics: 522
Solutions: 10,718
Registered: ‎04-04-2012

Re: Wifi Calling

Everything from S8 onward works on any firmware (allegedly).
I have no affiliation whatsoever with O2 or any subsidiary companies. Comments posted are entirely of my own opinion. This is not Customer Service so we are unable to help with account specific issues.

Currently using:
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone7 (EE)
Posts: 67,068
Topics: 662
Registered: ‎14-01-2013

Re: Wifi Calling

In fact, in the link I gave it states this

 

Your device should use O2 firmware if you bought it direct from us in an O2 shop, online or over the phone.

To check if your phone’s running O2 firmware, dial *#1234# and look at the CSC entry. If this line includes ‘TEF’, ‘O2U’ or ‘OTF’ then your device has O2 firmware and you can set up Wifi and 4G Calling. 
If the CSC doesn't include one of these codes then Wifi and 4G Calling isn’t supported on your phone right now.

If you need more info contact O2 business customer services.

*The Game Is On*


Level 1: Joiner
Posts: 9
Registered: ‎11-09-2013

Re: Wifi Calling

>wifi calling will work on any S9 regardless of firmware.

 

That is very interesting - and good news. Thanks