Hi. I have two data only "Internet with legs" sims, one in my car for on-the-go WiFi, and one in a tp-link M7350. Both of these sims have pre-loaded allowance of 24GB and an expiry of two years, I have been trawling round the Three website but I can't find any indication of how I can top these up, other than with a 30-day expiry.
Have I missed a trick, or do I have to buy a new sim to get the 24Gb/2 year allowance? Shame if I have to, as these are not used regularly, but are extremely handy if your home broadband fails (as mine did today), or for my wife if she is out and about with her tablet (mainly at the hairdressers 🙂 )
Any help appreciated.
