They did say that balances can be transferred.
The number given is a Jersey one, but I've done a couple of test calls and they come out of my free UK O2 allowance. So, I'll pay 7p per min to receive a diverted call while I'm abroad against O2's ... 7p a minute! The only thing is that if O2 Travel is activated, you pay a flat rate of 50p per message received.
I want one that's free to receive -
07mobile.com | 100% Free Roaming | No Expiry | No Fees ! looks good, but their website doesn't fill me with confidence...
Prepaids - FR: SFR; BE: BASE; PL:iPlus simdata UK: T-Mobile; International: SIM4Travel / Trupphone
Contract - UK: O2
Phones - Nokia 700
Phones in store - Nokia 5100, 3230, N70, 5500, N96, N95, 6230, 1100