Originally Posted by Zee_Bukhari:
“I don't get this. On my postcode it says you can make calls use data and send a text on the 4g network yet nothing about this supervoice what people are talking about, or is this just a word made up on this forum. Tried making a call on 4g near my house where otnsaid incould call on 4g but switched to 3g.”
After looking at some different postcodes with some different device settings it looks like there are at least four tiers of 4G service now. The best, which seems to only apply to areas with indoor&outdoor coverage, in an area that has been VoLTE enabled, and for a device that is VoLTE enabled for Three (which as I understand it is the Galaxy S5 only at this stage), is:
"Excellent
You can make calls, send texts, and use the Internet in most instances on our 4G Super-Voice network. You should also get super-fast call set-up times and crystal clear HD-calling. Just so you know, indoor signal strength may vary."
The next tier seems to be same as above but for outdoor coverage, which gives:
"HEADLINE NOT USED
Good. Great news! Your phone is compatible with out VoLTE network, so in most instances you can make calls, send texts and use the Internet over our 4G network. And just so you know, indoor signal strength may vary."
The next tier after that is 4G indoor&outdoor but with a phone that isn't VoLTE, or in a non-LTE area:
"Very good service
You can make calls, send texts and use the Internet over our 4G network. Just so you know, indoor signal strength may vary. And good news about your phone it's 4G compatible."
I think the wording is misleading there though - presumably they mean you can make calls (on 3G), send texts and use Internet on 4G, as you can't make calls on 4G unless you have a VoLTE enabled phone and are in a VOLTE area. Then you have same as that but outdoor coverage only:
"Good service
You should be able to use the Internet in most instances on our 4G network. Indoor signal strength may vary. iPhone 6 is compatible with our 4G network."
I expect the wording subtly varies depending on which specific phone you are searching for, and of course if you have a non 4G phone (or one that doesn't do LTE band 3/20) you'll get something different again.
It's worth considering that this very much seems to be a soft launch at this stage - no official announcement has been made so expectations should accordingly be rather low! Just consider yourself lucky if you do get VoLTE ahead of any official announcement or launch!