X301 Alternatives to Ericsson F3507G 3G card

[u751920]

Hi All,
I've been having real trouble with this card - the connection will drop after about 2 minutes. I then have to turn the card on and off to get another 2 mins. I cannot locate the correct driver for windows 7, I actually think it doesn't exist.
Can people tell me what other cards they are using? Or what other cards might work for me. I would like to retain the GPS function if possible.

Thanks