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It is one of the many Android secret codes that only work on Samsung handsets. I've answered some common questions below.

Why Is My Android Touch Screen Not Working? (The Complete Guide).

#S4 att diag mumenu software upgrade#

Some of the options recovery mode offers are a software upgrade and system reset. This BIOS related setting lets you control your phone without accessing the Settings app. What's more important is that if your mobile is rooted, you'll have the option to overclock it. Through the hidden menu, you can view your CPU performance. If your device is rooted, you can change its hardware acceleration. Improve Battery LifeĮngineering mode lets you stop apps running in the background.

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However, entering engineering mode lets you change the file format.Īlso, you'll be able to set your ISO value, change image size and the frame rate of videos. Most Android devices store images as JPEG, PNG, and JPG files. Altering your Band and Frequency settings improves your signal strength as well. All you have to do is change your Band and Frequency settings. The advanced settings in engineering mode let you increase your WiFi range. You'll be able to bypass control lists on servers and routers. You can change your MAC address through the hidden menu. Mac Addresses are unique 12 character codes that help LANs identify handsets. You can change it back through the Engineering mode settings. If you've rooted your smartphone, you might have lost your IMEI number. It helps you track your mobile if it gets stolen.

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Change Your IMEI CodeĪn IMEI number is a unique 15 digit code used by service providers to identify devices that are connected to their network. Improve Internet SpeedĪre you stuck with a less-than-great ISP? Engineering mode lets you change your network band, which could possibly result in faster internet. You can also improve the sound input of your microphone. The advanced settings in the hidden menu let you increase your audio levels above the available maximum level, and you can tweak your audio settings to cancel out background sound too. You might want a little more sound from your phone's speakers. However, most people use it to optimize the performance of their mobile phone.īelow is everything you can use it for: 1. What Can You Do In Engineering Mode?Įngineering mode has advanced settings that even let you configure your handset's hardware components. When it is installed, open it to access the secret menu. If, for some reason you don't want to enter engineering mode through the above method, you can download the MTK Engineering mode app on the Google Play store. Method 2: Download the MTK Engineer Mode App Sony Xperia doesn't have an engineer mode, but the step to access their equivalent (Menu Service) is similar to the others. Go to Settings > About Phone to find your build number.On LG smartphones, you have to include your manufacturer build/model number along with your special code.

Click on Key Input (on the right hand corner of the screen).A window will pop up saying you've entered 'Service Mode'.You'll have to enter special codes, which differ based on the brand. The dial pad is the most popular way to enter the hidden menu.

There are three different ways to do this: Method 1 : Use Your Dial Pad

Method 2: Download the MTK Engineer Mode App.