Ok, then how do you know it on an iPhone that it is indeed connected to 5G SA?
From my iPhone, both M1 and Vivifi are connected on the n78 band, given that M1 is SA only, this can mean that Vivifi being on the same band should be the same, although earlier, ST is also using NSA on n78.
My earlier experience with Vivifi before I ported back in again, SA option on iPhone is greyed out, meaning no SA option that can be turned on. After the recent port in, SA option is available.
An update on this topic :
I ran a test on all my sim card and noticed that when "5G Standalone" option on iPhone is greyed out, there is a statement right beside saying that the sim card does not support 5G SA.
So if your ST MVNO sim shows grey out for "5G Standalone" option on iPhone, you probably need a sim swap for 5G SA.
This only shows up on my ST MVNO sim cards, for both 5G NSA & 4G only plans, issued ard Q2 2025.
m1 & starhub MVNO all appears to be 5G (SA) sim cards, even though most of them are 4G plans.
This could be related to them having 5G SA offerings unlike ST MVNOs.
Simba is an oddball : The line for 5G SA option doesn't even appears. Instead there are options from 2G to 5G, even though they never had 2G & 3G service. Also there is an entry for VoLTE, which has been removed in general on iPhones for a while, but no mention of VoNR or Voice over 5G SA.
On Android OneUI 7, 5G SA option is shown regardless of 5G / 4G sim
