My wife and 2 sons moved from GoMo and Vodafone to 48.ie back in Nov/Dec last year. They have Swappie sourced iPhone X and iPhone 12's and none of them can get 4G working at all. They all had 4G on their previous networks and even after making all the APN updates on the phones, they still only get 3G (no option to select 4G). We've applied all the settings, reset the networks, enabled roaming etc etc and if I move my vodafone SIM to any of their phones I get 4G straight away (so it appears it's not a device limitation) and if I move any (all) of their sims to my iphone 12 the phone gets limited to 3G. Running fast on all of their phones gives a consistent 520kbps (wifi disabled) and they're all on the 14.99 prepay plan with no data used (unsurprisingly at those speeds 😞  . I've been on to chat support a load of times, no help whatsoever, just keep telling me the same thing, apply the APN settings, reset the phone...anyone got any more inciteful ideas?