[Lenovo K900] zenitvfnl:
Attention! This topic applies only to holders of dual-band routers that support 5 GHz .

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If the phone firmware to firmware 142 (240 or 113 obsolete, recommended 142) or on your phone will not turn on WI-FI- 5 GHz band or included , but the router is not visible in the list of networks - the reasons may be two: the first reason is the change region for the phone , the second to set up the router.

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How to change the region on your phone :

1) Go to Google Market , searching for looking WiFix Manager

2) Download, install . During installation, ask root - give it a root.

3 ) Run , click Install WiFix, put a check in the Advanced Configurations. This opens the field for entering the region - or introduce KR SG, close the program and restart the phone .

4) After the restart dialer dials * # 94349 # ( alpha looks like * # WIFIX #) and press " call " . Pop up message " connection problem or invalid query USSD" - do not pay attention to it. Below the inscription should pop "WiFix Engaged!"

5) Turn off / turn on the WiFi on the phone and all . The phone would have to see the 5 GHz band network , but so far only on channels 149-165 .

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Unlock phone work on all authorized channels 5 GHz :

1 ) Install Root Explorer or any similar program that allows you to edit system files .

2) Open the file / system / etc / wifi / bcmdhd.cal as text.

3) Find the setting ccode = CN

4) Replace it on ccode = 0 and save the file .

5) Turn off / turn on the wi-fi on the phone.

All phone is now able to work with all channels 5 GHz - 36-64 and 149-165 .

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Work supported by the 802.11n standard , the connection speed of 65 Mbit / s .

What if the router is still not visible in the list of networks :

It's very simple - the router also need to change the region to 0 (zero ), set exhibit any channels from 36-64 to 149-165 , you can set the width of the channel 40 MHz channels such phone understands.

Highly desirable encryption WPA2.

If the router supports changing the choice of the country of the region in the web interface , then choose the SG ( Singapore) or KR ( Korea ) .

If all else fails - you can use the program WiFi Analyzer, which visually shows all available networks , their channels , signal strength , etc. At least you can understand - all visible network or not.

Router Setup :

Happy owners router ASUS RT-N66U ( and similar ) can ask me in PM how to change the router region .

More advanced can do it yourself :

the console itself is located at "link"

go to the console of the router and enter the console turns these lines :

nvram set pci/1/1/ccode = 0

nvram set pci/2/1/ccode = 0

nvram set wl0_country_code = 0

nvram set wl1_country_code = 0

nvram set regulation_domain = 0

nvram set regulation_domain_5G = 0

nvram commit

reboot

After all this waiting for a minute and a half , the router will reboot and everything should work .

Help regions and channels.

Channels 1-11 , 36-116 and 132-165 approved for use in the USA and Canada

Channels 1-13 , 36-64, and 100-140 approved for use in Europe and Japan ( in Japan yet and the 14th channel).

Channels 1-13 , 36-64 , and 149-165 approved for use in Australia , Hong Kong and New Zealand

There will be questions on this topic - ask, do not hesitate.

a link to the original can not give, because I've been a novice