UK SIM not working in Australia
Since arriving in Australia, I've been unable to use my Smarty UK SIM (just required for 2-step banking authentication etc as I have a local SIM for calls, texts and data).
The SIM is recognised by my phone and multiple local phone signals are identified but for some reason I can't connect to any of them.
The APN is now set to mob.asm.net but the change was made post-arrival in Australia - could this be the source of the problem?
I've tried toggling all of the various settings on and off but without success.
My local Aussie SIM works fine in my Poco F3 but it stops working when my Smarty UK SIM is added to slot 2 - my Smarty SIM is therefore currently residing in my old Motorola g(8).
I was last in Australia in April 2024 and my Smarty SIM was connecting without any issues at that time. In the meantime, the 3G network has been turned off in Australia. I mention this in case it is significant but as the settings on my 2x phones allow me to select 5G (Poco F3) and 4G/LTE (Motorola g(8)), I assume this is not the root cause of the problem.
I don't know if it's relevant but I should also note that I was unable to connect to either WiFi or mobile data while on the train to the UK airport.
Ideally, a solution to this problem can be found but, if not, what are my options?
1. Smarty could send a replacement SIM to my UK address for a relative to post to Australia (it probably wouldn't arrive until after Christmas)
2. Is it possible sms messages to be forwarded to another number (similar to call forwarding for voice calls)?
3. I could do nothing (not a great option as I'm staying in Australia until after Easter 2025)
4. Are there any other options?
All suggestions welcome.
TIA