Mobile phone - rerad antenna

[pcwilson]

We've just moved from Orange to O2 and the mobile phone users at one of our companies can't get a signal in the office. The office is in Glasgow city centre but it's in a basement. They used to get a perfect signal with Orange, so as you can imagine, I'm not flavour of the month.

I know you can get re-radiating antennas to boost GPS signals, and I'm wondering if there's an equivalent for mobile phone networks, such that I can mount the antenna outside the building and send the signal down a cable and re-radiate it in the basement.

Any advice would be much appreciated.

Cheers
Phil