I currently have a SE T610 but over the last couple of days it's got ill. Bluetooth will no longer work and the battery is only lasting around a day.

I only use around

Carphone warehouse is mainly Motorola's with BT

http://www.carphonewarehouse.com/commerce/servlet/gben-pd-ProductDisplay?S=40&PN=PAYGO&filter_partModel=MOTE550

This doesn't look bad

http://www.carphonewarehouse.com/commerce/servlet/gben-pd-ProductDisplay?S=40&PN=PAYGO&filter_partModel=O2PPX1B

As you have a T610 why not get a T630

http://www.e2save.com/mobile/phones/disphandset.php?network=payg&handset=T630T

I'm sure there are plenty of deals around, could try Tesco or even M&S are selling phones now,

www.virgin.com/mobile think thats correct, plenty of refurbished phones normally on there all unlocked to use on any network.

K700i on virgin looks good,

Eddy, on PAYG with Virgin there is very little small print, not time outs of credit, 3p texts to other virgin users, 10p to other networks, 5ppm calls to landlines and other virgin mobiles, 35p to other networks, I have a virgin mobile on PAYG and do not have any problems with them especially for low usage, also can be used abroad roaming is automatically on.

I persoanly have not had any problems with them in the last couple of years of using, + customer services is in UK afaik. {Sadly I cannot say the same for 3 LOL}