The iPhone 5s and iPhone 5c is not expected to be officially released in Thailand until the end of the year. However, as usual, places like MBK will be selling them on the grey market. This could be as early as Friday evening but more likely by Saturday or Sunday. Please note, if you buy an iPhone on the grey market this weekend, you are not only paying a lot more than official prices but also there won’t be any warranty. If something goes wrong with it, you would need to fly to Singapore or Hong Kong to have it repaired.
You can reserve an iPhone 5s or iPhone 5c now at MBK. These are the prices I got from one shop and as you will see, it varies a little to the chart above by @flashfly –
Prices of iPhone5s at MBK #Bangkok from Friday: 16GB ฿32,900, 32GB ฿35,400 (black) ฿37,400 (white), 64GB 36,900 (black) ฿38,900 (white)
Prices of iPhone5c at MBK #Bangkok from Friday: 16GB ฿21,500 & 32GB ฿25,500. Colours are white, pink, yellow, blue & green
These are expected prices of iPhone 5S in #Thailand at end of the year: 16GB 24,700B, 32GB 28,700 & 64GB 32,200 (Based on Singapore prices)