As i frequently yo yo between Libya and UK, I would love to have a dual SIM card adaptor on my unlocked 3GS, because the rebel serpent case i use covers the SIM card opening and taking off and putting back on the rebel case is an absolute b*tch as it loosens the case over time. So would like to get feedback from people who are successfully using a dual sim adaptor on their 3GS. Not too bothered about cost as long as it works reliably. Perhaps something like this:
Not tried one in my iphone but I used in one in a succession of SIM free Motos up to and including the 2G V8. I used one for work and one for home with the work number forwarded to the home number so all the calls came through on the same one. As earlier poster said they were a bit unreliable but the convenience was worth the occaisional freeze and reboot.
However when I got the 3G Moto V9 it refused to work and crashed the phone. It took several attempts to reboot successfully. I assumed it was something to do with the 3G or maybe a combination of 3G and 2G SIMs. Either way I decided not to bother with trying it with the iPhone.
Having said that, the adapters are only about £10 and if it doesn't work it's not the end of the world. The early ones worked by switching the phone on and off but the later ones put an extra menu (on games/apps I think) and you could just switch to make calls on the network of your choice. The most tricky bit is cutting the SIM cards down to fit in the adapter. Advisable to do this before trip to the pub )
Wouldnt bother tbh as most ive tried never work successfully over the 3g network and even ones that meant to work over gsm are very unreliable.
I even went mad recently spent near £40 on one for my nok 5800 which supposedly worked over 3g and even hspda.Did it work of course not