I am a current Verizon US customer and upgraded to an iphone 6. I am travelling to the Philippines for visit and I would like to use my iphone 4S using a local sim card from either Smart Communication or Globe Philippines. I am told that the iphone should be unlock for their respective sim cards to work. What's the process of unlocking this phone 4S? In my research, this should be covered under the CTIA that was recently signed into Law.