My wife and I have been a very loyal PAYG O2 customers for almost 6 years now. Most (99.9%) of our 3rd party calls are international calls to mobiles in the Philippines. We feel that the people calling the countries like India, Singapore, Hong Kong, Thailand, China, Malaysia, Bangladesh, Cambodia and Indonesia are very lucky because they are charged much cheaper than us who are calling the Philippines most. I think it was 3 years ago when O2 reduced the call rates to Philippine mobiles from 12p/min to 10p/min. We were very happy about it even though the rate was still much higher than those countries I mentioned. After 3 years, the call rate to Philippines mobiles remains the same.
I think it's time for O2 to review and reduce the call rate to Philippine mobiles and make it near the rate if it can't be made the same rate as those in Singapore, Malaysia and Thailand. My wife and I are spending more than £60/month on PAYG topups for international calls to Philippines and we are looking for competitions' offers to get more value for our money. If O2 doesn't make any move soon, it will surely lose two very loyal cutomers. 
On the other hand, if O2 reduces its call rate to Philippine mobiles, I will be one of the free agents for O2 to convince other Filipinos (more than 40,000 in UK) to use the O2 International Sim.
