My last top-up was exactly 1 year ago - Feb 18, 2025. After that, I had an extended visit to the UK in March, and then some chargeable text activity in Canada about 5 months ago. And there's still lots of credit left in my account.
My understanding has always been that either topping up or doing something chargeable at least every 6 months would both have the same effect on keeping the account active. That's the way it seems to have been, for a number of years.
If that was wrong - i.e. if it's only top-ups that 'reset' the clock, rather than also chargeable activities - then the 'one year top-up anniversary' might, on the surface, appear to explain the problem.
And, in the absence of any other solution, I suppose I could top up a small additional amount, and see if it makes a difference. But ...I had no problem making a chargeable phone call today - and verified that my balance was reduced accordingly. In other words, only sending SMS messages has failed to work..
