How to buy a cheaper price iPhone 5S in Thailand

A guide to buy iPhone 5s in Thailand as you may know that even though that iPhone 6 is ruling the market and available world wide for the customers.
Anyway ,in a case you might looking for the previous version of  iPhone then iPhone 5 is a solution for you to select.
What is the big different between the latest iphone 6 VS iPhone 5
well to be short for sure iPhone 6 is better than iPhone 5 in CPU speed , Ram and OS so iPhone 6 is faster and better but not cheaper for sure .
So ,consider save cost and get iPhone technology as well in my point of view iPhone 5 is still very interesting because if you are a student or low income person if you try to catch up with the newest and latest mobile phone technology is not suitable and good course of action.
Well, iPhone 5 16 GB is still available for interesting customers in Thailand and table below is a price comparative among the ISP in Thailand.
There are 2 types of buying 1 with the monthly subscription in a lower price when compare without monthly subscription.

Model	AIS	DTAC	TRUE	*Remark
iPhone5S 16GB	12,900.00	13,000.00	13,000.00	No Subscription
	8,900.00	9,900.00	8,900.00	Price+Monthly Subscription

" The iPhone 6 is a great smartphone but isn't a must have upgrade if you have an iPhone 5s as the upgrades are fairly minimal. If you don't mind the smaller screen, the iPhone 5s remains a decent buy with Touch ID, a great camera and solid performance. Buy the iPhone 6 if you want a bigger screen, more storage and longer battery life."