I know people are still on the lookout for ways to unlock their iPhone 3Gs and now some people are claiming they’ve done with just a YESSIM sim card. No software needed. The only prerequisite is that you have a jailbroken iPhone. 
So what’s the downside? I still don’t see any proof. Sure, there’s a video–and it’s posted below–that showcases this YESSIM unlocking method. But the site’s FAQs and information are vague at best. Plus, the video doesn’t really show all that much.
What will it take for a video showing this unlocking process for real to show up online? Until then, I’m not convinced.
[youtube]http://www.youtube.com/watch?v=eggVCvsdr7I[/youtube]
[via The iPhone Blog]
I have tried it, but it is not working very stable. my friend has unlocked his iPhone 3G with a card called Universal Sim and told me it is working well.
Yessim does work. I have a 3G iPhone bought via ATT running in Japan. I bought this handset as the Japanese won’t sell it to us foreigners stating ‘for new customers only’ — which is not correct. Anyway, I used a Yessim and reprogrammed it using their USB unit with updated settings and hey presto– it does unlock the unit. Phonecalls in / out work fine plus SMS. Of course, if you want the settings of your operator to use the Internet, they must be added separately. Yessim works :-)
Thanks
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