mobile

Many people have reported seeing the Korean version will jump from 3G 2G, use this method to lock the 3G network.
L dial keyboard input 319 712 358, out of the password: 0821, election NETWORK SETTING, then select NETWORK MODE, then select WCDMA ALL!
K dial keyboard input 319 712 358, out of the password: 774632, choose NETWORK SETTING, then select NETWORK MODE, then select WCDMA ALL!
S dial keyboard input 319 712 358, out of the password: 996412, choose NETWORK SETTING, then select NETWORK MODE, then select WCDMA ALL!

Be warned for your device safety don't try to ticker other setting if you have no idea of what your doing.
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This is the L menu, SK's menu may be different!
Debug Screen debug mode (suitable package CDMA_1X EVDO_LTE WCDMA_GS WIFI)
Mode SIO serial input / output mode
Version Info Version Information
Call Setting Call
Channel Setting Channel Settings
Network Setting network parameter settings
Data Setting Data Set
SMSC address seting SMS center address setting (hair no text can be set here, the last digit of 145)
First / Last Call first / last call records
Do Rev. Setting LTE-eHRPD network settings (ehrpd network on and off)
Reset Count counter reset
Wifi Debug Screen Wifi debugging
FOTA Testing FOTA firmware upgrade wireless test
set TouchKey Setting touch
Backlight AlWays On Backlight normally switched on / off
switch on the Auto Answer Auto Answer
Set LTE ANT Path Normal setting LTE antenna interface
CGD2 Test this I do not know ~
videocall setting video call settings
VT SIP REG VT SIP protocol registration

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1. Strengthen 3G stability, the Korean version will jump from 3G 2G, use this method to lock the 3G network:


L:dial keyboard input 319 712 358, out of the password: 0821, election NETWORK SETTING, then select NETWORK MODE, then select WCDMA ALL!


K:dial keyboard input 319 712 358, out of the password: 774632, choose NETWORK SETTING, then select NETWORK MODE, then select WCDMA ALL!


S:dial keyboard input 319 712 358, out of the password: 996412, choose NETWORK SETTING, then select NETWORK MODE, then select WCDMA ALL!


2. Strengthen 2g stability, and power:


L:dial keyboard input 319 712 358, out of the password: 0821, election NETWORK SETTING, then select NETWORK MODE, then select GSM ALL!


K:dial keyboard input 319 712 358, out of the password: 774632, choose NETWORK SETTING, then select NETWORK MODE, then select GSM ALL!


S:dial keyboard input 319 712 358, out of the password: 996412, choose NETWORK SETTING, then select NETWORK MODE, then select GSM ALL!


3. accelerate 3G Internet speed:


Network mode select Automatic, with the return key return to Network Setting, select 5.HSPA setting, choose "HSPA_REL8", the phone will automatically restart, this time the fastest 3g.

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This is the most easiest way to enter hidden setting I watch the video in youtube on unlocking baseband but it is somehow complicated because you need to type a lot of number combinations.
Please give feedback and your location if you have experiences improvement or problems so that I can help you.