How to transfer text messages from iPhone 4 to iPhone 5?

Right now, I have an iPhone 4, bought in the Apple Store in Hong Kong. I will be purchasing an iPhone 5 soon, again in Hong Kong. I want to transfer all my text messages from my iPhone 4 to my iPhone 5. How do I do this? Is this actually possible via iCloud? Kindly let me know what the process is step by step. Thank you in advance.