Hi Mariko,
We have 3 providers in Singapore: M1, SingTel, StarHub. Which provider do you have in mind?
For UK it's complicated, but hopefully we will finalize couple of agreements in a month, stay tuned.
If you're interested, you can subscribe for notification whenever we add your provider here:
/GahUf]http://[Suspicious link removed]/GahUfEDIT: Link gets automatically cut from my post, but you can find it on website if you enter phone number of operator we don't support into the form