Hi there -
1. Thank you
2. When placing the SMS into an old iPhone and sending a messaging to that SIM, it immediately sends two old commands, "Switch" and "Switch", which were sent on 8th Jan. I suspect this will now correctly recognise these messages as sent. What else can I try to help with the investigation? After several hours, I have 4 or so "Status" messages come through to Router, which are 3 days old! It's all very odd.
3. I can confirm in a test to EE SIM that long messages are presenting correctly. I have reverted back to Modem storage and will monitor ongoing. Previously both EE and Voda were not correctly presenting longer messages. I will update