I'm a Spark on account customer. I bought a couple of roaming packs to use while in Australia on holiday.
Data seemed to work perfectly well for things like maps/navigation and general internet stuff but when I tried to access things like my banking apps or even the Spark app it wouldn't connect on mobile data. The same apps would connect on the hotel WiFi but I'm not happy using WiFi for banking particularly. The roaming was with OptusAU. Now that I'm home again all the apps happily connect via mobile data.
I assume it may be to do with security but my wife's phone on Vodafone was able to connect to those apps while roaming in the same location.
I can't see any settings within the apps themselves that would make any difference.
Any GZers able to shed some light on a setting I may have missed, or why this is happening?