Boot stuck and boot looping have been a common issue nowadays and in this post we will help you to clarify it. Complete guide to fix a boot stuck or boot looped device.

Basically, there are three methods to resolve this issue.

1). Delete cache from recovery mode.

2). Perform a hard reset from Recovery mode.

3). Do a reinstallation of  firmware through the Odin tool.(PC required)

1)Delete Cache Partition from recovery mode.

You need to boot your phone to Recovery mode first.Power off phone>Press Volume UP+Power button at same time and when Phone model name logo appears then release all buttons.>Recovery Mode>Use Volume up and down keys to navigate and then Select Wipe Cache Partition>Confirm>Check it by rebooting if not rebooting then refer to step 2.

First of all you have to boot your device into recovery mode. Next, switch off the device > press volume button + power button simultaneously. Then you will be able to see the logo name of your device, and release all the buttons. Switch to recovery mode, and then use volume up + volume down keys to navigate. Select wipe cache partition > confirm and then check it after rebooting . If it fails then try the second option.

2) Perform a hard reset from recovery mode.

Switch off the device and then press the Volume Up + Power button simultaneously . As soon as the device logo appears ,release all buttons. Navigate to Recovery mode> wipe data > factory reset> confirm and finally reboot will begin. If it fails, then try the third option.

3) Do a reinstallation of firmware.

Prearrangements

• PC
• USB driver installation
• Official stock firmware

Step 1- Download the latest official stock firmware of your device.

Step 2- Download the Odin tool and install it on your PC.

Step 4- Extract the firmware files using an archive tool. You will get 5 files: AP , BL , CP , CSC_ , HOME_CSC_

Step 5- Insert each file to the related field in Odin.

Step 6- Next boot to download mode in phone by navigating to Recovery Mode>Reboot to bootloader.

Step 7-Install the compatible Samsung USB drivers to your device. Connect the device to PC then Odin will detect your device and a blue box will pop up with COM port number on it.

Step 8- Tap on the start button and wait for Odin to say 'PASS' in a GREEN box.  Then your device will take time to boot the device t after this process. Download Magsik manager on your device.

• If your Android Smart Phone gets stuck on the logo screen?

       Switch to Download mode and run/repeat.

• If your phone won’t enter download mode?

       You can try three things:

1. A USB jig - Don’t pin your expectations on this, this will rarely succeed in this scenario.
2. 'Jumpstarting' – You may need someone else to give you a hand for this. Take the battery out of the phone and wait 30 seconds.

Next, press the button combination to enter download mode, and with this combination still depressed, get someone to put the battery back in. 

3. Take out the battery from your device, and re-insert it, but don’t turn the phone on. Next, plug in the charger while holding the volume down button. Keep holding the volume down button until you enter download mode.

• If Odin id "non-functional" and "Failed" error messages displayed?

   First, Unplug and plug the device again. Next, turn the device into DL mode and unplug it again and re-plug. Odin will identify the device automatically and then clicks “Start”.

• If you stuck with a random process or unable to proceed?

  Try with the latest Odin version available.

• If Odin does not detect your Samsung?

  Try multiple re-plugging and unplugging. Remember to use a proper USB too. Odin comes with a wide range of device support, in fact, almost all Samsung models are compatible with Odin, but it is a must to check the device specs and tutorial before heading to the process.

• If you're still not having any luck, then follow these steps.

1. Turn off both the computer and the phone. Fully shut down.

2. Disconnect the phone from the computer: the USB cable from both the computer and phone.

3. Boot up the computer. Log in and let it settle.

4. Startup Odin and let it settle.

5. Put the phone in download mode.

6. Connect the phone to a USB port.

20171026213326_mquts9xx5u downloaded from sfirmware.com

I tried to go step by step, I used Odin 3 v.3.13, use the AP, CP, CSC and USERDATA buttons. After odin runs for 5 minutes, then I press Start and I get the following log:

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<OSM> Enter CS for MD5..

<OSM> Check MD5.. Do not unplug the cable..

<OSM> Please wait..

<OSM> Checking MD5 finished Sucessfully..

<OSM> Leave CS..

<ID:0/003> Added!!

<ID:0/003> Odin engine v(ID:3.1301)..

<ID:0/003> File analysis..

<ID:0/003> Total Binary size: 7913 M

<ID:0/003> SetupConnection..

<ID:0/003> Initialzation..

<ID:0/003> Get PIT for mapping..

<ID:0/003> Firmware update start..

<ID:0/003> NAND Write Start!!

<ID:0/003> SingleDownload.

<ID:0/003> boot.img

<ID:0/003> recovery.img

<ID:0/003> system.img

<ID:0/003> cache.img

<ID:0/003> hidden.img

<ID:0/003> boot.img

<ID:0/003> Transmission Complete..

<ID:0/003> Now Writing.. Please wait about 2 minutes

<ID:0/003> Receive Response from boot-loader

<ID:0/003> recovery.img

<ID:0/003> Transmission Complete..

<ID:0/003> Now Writing.. Please wait about 2 minutes

<ID:0/003> Receive Response from boot-loader

<ID:0/003> system.img

It has stopped there for two hours and I don't know what to do next. I have looked for solutions to this situation in the forum and did not find anything similar.

Please help!

What should I do?

I will appreciate all your help guys.