"...ใช้พ็อคเก็ตวายควายนี่ช้า..." May I suggest that you are on the fringed area and a DIY wifi antenna may help?

I googled and got some here:

Best homemade WiFi antenna ? - techPowerUp! Forums www.techpowerup.com › ... › Hardware › Networking & Security 13 posts - 9 authors - 21 May 2010 I have been researching homemade wifi antennas for use with my laptop. It has a built in card but I also have a USB wifi adapter I could use for ...

Make a DIY Wi-Fi Antenna From a Coffee Can [VIDEO] mashable.com/2012/06/11/diy-wi-fi-antenna/ 11 Jun 2012 – For just $5, you can make your own Wi-Fi antenna from a coffee can and reach networks that would otherwise be out of range.

Homebrew antenna shootout www.turnpoint.net/wireless/has.html 802.11b Homebrew WiFi Antenna Shootout ... Rob Flickenger, the net admin for O'Reilly, this design for a do-it-yourself, VERY inexpensive antenna made from ...