If the WIFI conecting is lost steady ,you can flash the ROM below to solve this problem.

NO.1 S6  Flash Tutorial and ROM Download link:

Firmware Version:20130712(ROM/Flash tool/driver)

http://pan.baidu.com/share/link?shareid=2599977738&uk=4178083362  

Firmware Version:20130919(Added smart pause-Eye Scroll and WIFI signal enhancement)

http://pan.baidu.com/s/1mTH3C

1,download
2,uncompress the folder, you can find 3 files(driver,NO.1 S6 ROM,flash tool)
3,install driver(boot your phone and connect to pc, in Device Manger you can find new device here, when install driver, point to the "driver→Android_Gadget_CDC_driver→Android_Gadget_CDC_driver.inf). after fineshed move your phone from pc.
4,open the "flash_tool.exe", click“open update file" point to “NO.1 S6 ROM-20130712→MT6589_Android_scatter_emmc.txt".
5,click"firmware upgrade" , shut down your phone and connect to pc, flash……100%
6,done

CHINAPADMALL