OK, this is what came out of me pushing Virgin (EE) to solve this. NOTHING.
What I found out is this. EE is the merger of Orange and T mobile as you probably already know, what this really means is they are mad busy decommissioning towers that "overlap".
What really rips my undies is when they told me "no network issues", this means your coverage is no longer available and therefore the network expects not to deliver coverage. Not offering you a signal is not a network issue "apparently".
So on EE expect years of variable connections.
Don't try to use a signal booster either because if the towers are changing then you will be up and down your roof moving you're aerial...plus they just plain don't work. The company "Mobile Booster" is some dodgy company I tried. It did not increase my internal mobile signal, in fact, it reduced it.
What I should do is follow what my neighbours did and change to Vodafone who also have poor coverage here BUT they offer a call to wifi thing that does work (like WhatsApp). There is talk about Virgins app but this has been removing so no solution with Virgin. EE does have a signal booster option that that will cost.
Just on the specifics of WiFi calling - you may be interested to know that currently Vodafone & O2's implementation of Wifi calling does not support SMS, and that text messages can only be sent over mobile. EE's implementation includes full voice & text support and is totally seamless. So if you rely on WiFi calling to substitute for mobile coverage, then be aware it is literally WiFi calling-only on Voda & O2.
And there's a lot more to the merger of Orange & T-Mobile than just decomissioning some duplicate sites, although of course that has happened in many areas.
Literally just off the phone with 02, who told me as of November 2017 the TU Go app (wifi calling) will be removed and replaced with a seamless system (wifi calling without an app), this has the same great features your talking about but unfortunately for anyone with an older 'smartphone' it may not be supported.
You talk up EE's seamless system but lets not forget Virgin dont even have a wifi calling product, Virgin removed their wifi calling app years ago. For me 02 have a mast only .5 miles away and they promise it will work or my money back...so hopefully (for me) next week I will be off this virgin forum because I will have a product that I'm paying for that.... ACTUALLY, WORKS!
"Love Virgin Fiber hate Virgin Mobile"....Virgin Mobile, you can use that catchphrase for free
I think you mean PAC not PUK ;-) A PUK code is to unlock a blocked SIM.
I'm glad you're pleased with your new network and hope it all works out for you. I'd personally take EE Wifi calling/4G800 over using O2 anyday, but indoor coverage is certainly an area where EE 1800/2100 can sometimes suffer.
I would much rather have calls over 4G internally with 02, than wifi calling via EE. Wifi calling is WhatsApp, except your paying for it! Users of wifi calling should be reimbursed for providing the wifi network to EE