Pay as you go (PAYG) indicating out of credit despite credit balance. I have a straight PAYG plan where I just pay for what I use (no monthly plan). I have had this plan for many years with no problems. About 10 weeks ago my phone stopped working even though I had plenty of credit. I would get a message indicating that I’m out of credit when I try to make a call or send a text, despite my credit balance. I hadn’t topped up my balance for quite a while, so I added some credit and the phone started working again, but only for about a week, and then it stopped again. I did some research on ChatGPT and it said the problem was caused by having an older phone (iPhone 11) with an old SIM (over 5 yeaars old), and that a new SIM would correct the problem. So I ordered a new SIM from ID about 8 weeks ago and that seemed to fix the problem, but now it’s happening again. It tells me I’m out of credit even though my balance is currently almost £10. Is there a requirement that you must top up periodically even though you still have plenty of credit? Please help. Th