Compare the cheapest Smart Phone in Thailand

When you come to Thailand and if you want to buy a very cheap mobile phone from The mobile phone company in Thailand and if you want to make a compare for the lowest price of the phone in all companies. A table below is a listed of lowest price mobile phone for you to compare and consider before buying.
The lowest price listed in Thai Baht and for the zero price from TRUE company is a price that the customer have to buy with monthly subscription.
All of the phone are android OS and dual SIM 

ISP	Brand	Price	Website:
AIS	LAVA iris 515	1590	http://store.ais.co.th/th/mobile-phone.html
DTAC	Clearance! dtac Phone Joey Jump 3.5	690	http://www.dtac.co.th/device/
TRUE	True Smart 4G Speedy 4.0	0	http://truemoveh.truecorp.co.th/device
Power    Buy	GO LIVE S2+SINGLE SIM	694	http://www.powerbuy.co.th/p/go-live-s2-single-sim

For more detail : Go to Their Website and learn more about the spec and feature.