Here's the latest on the saga of my Nexus 7 3G and the O2 SIMs.
I couldn't connect via the SIM today but I didn't get the message about topping up. I could only assume the free credit which was manually put on the SIM had run out.
So I've been on the phone to O2 yet again!
I have now been told the following:
The SIM in my Nexus is an iPad SIM (I knew that) but the only way it can be topped up is via iTunes and and since it's not in an iPAD that's not going to work! (The reason it worked for a while was that someone (the bloke on the phone in my previous instalment) had manually fiddled the systems to add some credit.
The website I was originally linked to from the alert on my Nexus was the mobile broadband top up page. Apparently, for that to work it requires some firmware (?) in the dongle with the mobile broadband SIM in it. That's also why the bloke in the shop couldn't get it to work. I can only assume that because the bloke in the O2 shop changed all the settings to the iPad ones, I didn't get the original alert again about topping up with a link to the mobile broadband top up page again.
O2 PAYG SIMs come in different flavours; iPad SIMs which can only be topped up via iTunes, Mobile broadband SIMs which usually use the firmware in the dongle to add software to your PC which manages the connection to the O2 website to obtain credit and bog-standard mobile phone SIMs which you can top up via the phone, with a top up card or online.
Any O2 SIM card with credit put into the Nexus will work BUT it isn't possible to top it up from the tablet once it's in the tablet.
Presumably if you opted for a monthly plan this wouldn't be an issue.
So, he had two suggestions; get a mobile broadband SIM from O2 then get a pair of scissors and cut it down to Micro SIM size!
, or get a bog standard micro-SIM for a mobile and top it up online.
He wasn't sure the first one would work but if does then you should be able to top up if you ran out of data. But then he also mentioned having to swap the number over for some reason. By now I was losing the will to live (if you've read this far, you probably are too!) and couldn't be bothered to press him further on the reason especially as he said I'd need to phone them back once I'd got the SIM to get that sorted - I think it was something to do with it not being in a dongle but in my Nexus and I had visions of all the hassles I'd already had repeating themselves! The second suggestion will work but once you've used up the 500Mb data allowance you'd have to wait a month (apparently) before you could top it up again. He also mentioned something about getting a bolt on so I'd effectively have 1.5Gb for a tenner a month but I'd given up listening by then.
So.... I've just put a bog-standard PAYG micro-SIM in I had lying around, reset the settings on the Nexus and topped it up online and it's working again.
For now...
I think the moral of the story is that O2 aren't geared up for any tablet other than an iPad and I'm not tech-savvy enough to be an early-adopter of so-called new technology.