I unlocked mine using this:

http://www.jhangra.com/blog/2009/07/how-to-unlock-your-3-zte-mf627-usb-mobile-broadband-dongle/

Thanks for the information that you provide. My father presented me a sony ericsson & i got the unlock code from a href="http://www.mobileunlocksolutions.com/" mobileunlocksolutions /a which was unlocked

I went into 3 and one assitant told me you couldn't get a sim for a mobile broadband dongle, but when I went in again another assistant said that a standard 3G 3 phone sim would work and tried to sell me one for £1.99.
I might go back again and ask a 3rd assistant.

The author is incorrect in stating that 3 do not offer SIM only broadband. I've been using a 3 SIM in a Dell notebook with an internal HSDPA card for the last six months.

SIM is availble here for £10...

http://threestore.three.co.uk/payg/?modem=1&id=1201

Click on 'SIM with Credit' button bar.

Errhhhh - you were having trouble getting hold of a 3 SIM? 

Do what I did some 6 months ago - go into a 3 shop. Buy a SIM card for £5 (they sell them there you know!). Top it up and buy a PAYG mobile broadband bundle for 30 days.

No need to resort to Ebay! :)

Vodacom sells sims on their own in South Africa, and you can just add the 3G pay as you go packages to it and use it. I was doing that with my unlocked Samsung U800 which I got from Virgin Mobile SA, since they didn't offer 3G at the time (and still don't I think). I'd just swap over to the vodacom prepaid sim any time I wanted to use the phone as a usb modem, and that worked fine. 

But that's not uncommon there, since all phones in SA are sold unlocked (by law I think). Had no problems getting 3.6mbps on it so I would assume if they roll out 7.2 it'd work fine as well.

Same phone works fine with a prepaid AT&T sim here in the USA too.