Quick Pre Requsiites:
•  Create a backup of all the Data in your Samsung Galaxy Grand Android Phone manually with the help of below mentioned manual steps. Apart from the below mentioned steps, make sure that you are also creating a backup of all the Chat Messengers data as it will also be wiped off after rooting the device.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log – Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”
•    In your Samsung Galaxy Grand, enable the USB Debugging Mode from “Menu > Settings > Applications > Development option”. Minimum battery left in your Samsung Galaxy Grand Android Phone should be > 50% or else the device might just get turn Off in the middle of firmware update process.
•    Download “Root Checker” app from Google PLAY Store to check on whether your device is rooted or not.
Disclaimer: We should not be held responsible / liable in any manner for the damage happened to your Samsung Galaxy Grand Android Phone due to not following instructions.
Procedure to Update Samsung Galaxy Grand with Lollipop 5.1.1 Android OS:
• 

This message often pops up when you Download or Transfer large size media files and Install Apps of large size on your android device.

Note: Check the Storage in Settings on your Samsung device and make sure that sufficient data is available. If no data is available you need to delete some Music, Videos, Photos or Uninstall some Apps to release some space.

How to fix Samsung Android App Installation Error – Insufficient Storage Available:

Download and install the App Cache Cleaner – 1Tap Clean from Play Store
It is a 2MB App so i don’t think your device will show the error in installing this app as well
now all you have to do is launch the app
It will automatically calculate the Cache Size of all the applications on your device and show you the list on your device
After the Cache sizes are calculated you will get an option to either Clear cache of all the apps at once by clicking on the Clear button on the bottom of the screenhow to fix insufficient storage space available on android devices
Or clear each Apps Cache separately by clicking on the Dust Bin icon seen on the right side of Each App Name
You can see that considerable amount of space is being freed and now you can go through with your installations
To make sure that your Cache does not get piled up again you can even Schedule Reminders to clear your cache to remind you when the Cache reaches a certain amount of size or to remind you in certain time interval, which is very easy as seen in the image below.how to fix insufficient storage space available reminder in android
You can also schedule the App to “Auto Clear All Cache” at certain interval of time by clicking on the 3 dot icon on right side top of screen > Settings > Scroll down and click on “Auto Clear Interval” and set the desired time limit for Auto clearing cache in scheduled intervals.

Clearing Cache is the best way to clear memory as Cache is the temporary storage (caching) of web documents, such as HTML pages and images, to reduce bandwidth usage, server load, and perceived lag. A cached file stores copies of documents passing through it.

There are many Unknown Sources which are giving access to Apps present in App store like AndAppStore, SlideMe, Handango, and GetJar with even App developers like GameLoft. Apart from these sources which do their App installation themselves in case of smaller developers who offer Android Package (APK) file which should be downloaded and installed manually and for your android device to accept these files the option of “Allow Installation of Apps other than Play Store” should be ticked in the Security options of your Android device.

How to Allow App installation from APK files in SAMSUNG Android devices:

In your SAMSUNG Android device go to Settings

In the General Settings go to Security under Personal

In security settings page under the Phone administration you can find Unknown Sources(Allow Installation of Apps other than Play Store) – Tick it or Select it

When you are Selecting the above option a Pop up box will appear warning from doing so which should be closed by clicking on OK or Cancel

And below that you can find Verify Source (Disallow or warn before installation of apps which can cause harm) – Untick or Deselect this

After you have followed the above mentioned process you can now install apps on your SAMSUNG android device using the APK files available on the internet even paid or apps which are removed from app Store like the Flappy Bird which can be installed freely using the APK files.

In case you do not know how to install the APK files on your SAMSUNG Android phone let me explain the procedure in short: Download the APK files on your Computer, copy the APK file on your SD card from your Computer , download App Installer Application from android play Store on your device, in the application you can see the aPK files which you have earlier copied on your SD card, click on the Application file and the Installation will start.

Remember that you have to first follow the above procedure of Selecting the Unknown source option in settings to be able to help install the APK file as an Application.

Warning Note: Please note that since this is the custom ROM firmware, you need to have the root access.

Requirement:

· Data in your LG L40 Dual Android smartphone needs to be backed up with the help of below mentioned steps. Don’t backup the data with the help of KIES as it may not help you restore the data.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log – Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”

· Enable the USB Debugging Mode in your computer from the path “Settings > Applications > Development > USB debugging”. Also, the minimum battery life should be a minimum of 50% or else there is a risk of device getting turned Off in the middle of firmware update.

Disclaimer: We should not be held responsible or liable in any manner for any damage caused due to not following the instructions mentioned in this article.

Once you are done with all the above mentioned steps, you need to head over to the next step where we have summed up the detailed instructions which will help you update the device.

Procedure to Update LG L40 Dual Android smartphone with Cyanogen Mod 11 Firmware:

· Download the Kitkat 4.4.2 Android Firmware and Google Apps Package from here to your computer. Once downloaded, connect your device to the computer with the help of original USB cable and place the same in your device.

· Disconnect the device from computer and turn Off the same so that the device can be entered in the recovery mode.

· Recovery mode in LG L40 Dual can be entered by holding the Volume Up button + the Home key button (the middle button). While holding these both buttons, you need to switch ON your device.

· In recovery mode, select options to clear and wipe the data present in your phone by selecting the options like “Clear Data” and “Wipe Cache”.

· Once done, you now need to select the option of “install zip from sd card” and then select the firmware zip file which you have placed in the device and then followed by the Google Apps Package. It will take around 4 -5 minutes to apply both the zip files in your device.

Note: If at all your LG L40 Dual gets in the boot loop sequence then you need to turn off the device and then reapply the update from the start. To turn off you can reinsert the battery or say you can long press the power button

So there you go, you have successfully updated your device with the latest version of Kitkat 4.4.2 Android OS. Do let us know in the comments section just in case if you face any issues in the process of firmware update.

Warning Note: Please note that since this is the custom ROM firmware, you need to have the root access.

Requirement:

· Data in your LG OPTIMUS L7 P750 Android smartphone needs to be backed up with the help of below mentioned steps. Don’t backup the data with the help of KIES as it may not help you restore the data.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log – Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”

· Enable the USB Debugging Mode in your computer from the path “Settings > Applications > Development > USB debugging”. Also, the minimum battery life should be a minimum of 50% or else there is a risk of device getting turned Off in the middle of firmware update.

Disclaimer: We should not be held responsible or liable in any manner for any damage caused due to not following the instructions mentioned in this article.

Once you are done with all the above mentioned steps, you need to head over to the next step where we have summed up the detailed instructions which will help you update the device.

Procedure to Update LG OPTIMUS L7 P750 Android smartphone with Cyanogen Mod 11 Firmware:

· Download the Kitkat 4.4.2 Android Firmware and Google Apps Package from here to your computer. Once downloaded, connect your device to the computer with the help of original USB cable and place the same in your device.

· Disconnect the device from computer and turn Off the same so that the device can be entered in the recovery mode.

· Recovery mode in LG OPTIMUS L7 P750 can be entered by holding the Volume Up button + the Home key button (the middle button). While holding these both buttons, you need to switch ON your device.

· In recovery mode, select options to clear and wipe the data present in your phone by selecting the options like “Clear Data” and “Wipe Cache”.

· Once done, you now need to select the option of “install zip from sd card” and then select the firmware zip file which you have placed in the device and then followed by the Google Apps Package. It will take around 4 -5 minutes to apply both the zip files in your device.

Note: If at all your LG OPTIMUS L7 P750 gets in the boot loop sequence then you need to turn off the device and then reapply the update from the start. To turn off you can reinsert the battery or say you can long press the power button

So there you go, you have successfully updated your device with the latest version of Kitkat 4.4.2 Android OS. Do let us know in the comments section just in case if you face any issues in the process of firmware update.

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Warning Note: Please note that since this is the custom ROM firmware, you need to have the root access.

Requirement:

· Data in your LG L80 Dual Android smartphone needs to be backed up with the help of below mentioned steps. Don’t backup the data with the help of KIES as it may not help you restore the data.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log – Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names”

· Enable the USB Debugging Mode in your computer from the path “Settings > Applications > Development > USB debugging”. Also, the minimum battery life should be a minimum of 50% or else there is a risk of device getting turned Off in the middle of firmware update.

Disclaimer: We should not be held responsible or liable in any manner for any damage caused due to not following the instructions mentioned in this article.

Once you are done with all the above mentioned steps, you need to head over to the next step where we have summed up the detailed instructions which will help you update the device.

Procedure to Update LG L80 Dual Android smartphone with Cyanogen Mod 11 Firmware:

· Download the Kitkat 4.4.2 Android Firmware and Google Apps Package from here to your computer. Once downloaded, connect your device to the computer with the help of original USB cable and place the same in your device.

· Disconnect the device from computer and turn Off the same so that the device can be entered in the recovery mode.

· Recovery mode in LG L80 Dual can be entered by holding the Volume Up button + the Home key button (the middle button). While holding these both buttons, you need to switch ON your device.

· In recovery mode, select options to clear and wipe the data present in your phone by selecting the options like “Clear Data” and “Wipe Cache”.

· Once done, you now need to select the option of “install zip from sd card” and then select the firmware zip file which you have placed in the device and then followed by the Google Apps Package. It will take around 4 -5 minutes to apply both the zip files in your device.

Note: If at all your LG L80 Dual gets in the boot loop sequence then you need to turn off the device and then reapply the update from the start. To turn off you can reinsert the battery or say you can long press the power button

So there you go, you have successfully updated your device with the latest version of Kitkat 4.4.2 Android OS. Do let us know in the comments section just in case if you face any issues in the process of firmware update.