Galaxy A5(2015) restarts again and again. - Galaxy A3, A5, A7, A8, A9 Q&A, Help & Troubleshoot

Hello, i wanted to change frequency bands on galaxy a5 and use this thread:https://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059, after i restart device, it started but after few seconds it restarted automatically, after started and same.
what can i do, if i install stock rom may it back to normal(after hard reset from twrp, and install custom os nothing changed)?

Can someone help?

Clean wiping and installing stock ROM will obviously fix this issue. If you are on a custom ROM, you can try wiping and reinstalling the system partition only which may fix the issue of boot loop.

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[Q] Stuck in Samsung logo after first reboot (second)

Hi guys,
I can install any ROM in my S4 and the phone makes the first boot, enter in OP and i can configure anything with normal function.
But the problem appears when i make the first boot after this, stucks in Samsung Galaxy S4 LOGO and dont exit. I already made a wipe cache/dalvik but nothing happens.
What can i do?
when you are flashing a new rom are you wiping system? if not do so
if you are wiping system you may have a root thats not sticking after a cache wipe. if this is the case then you will need to flash su.zip found here-->http://www.androidfilehost.com/?fid=22964708692722463 before you flash a new rom. if you find that this is the case and that your root is not sticking i would suggest downloading twrp 2.5.0.2 from goo.im. after flashing this latest version it fixed this exact problem for me. NOTE: i am on MDC not MDL so if you are on MDL be careful what you do....this may not work for you.
also if when you are restoring your apps and whatnot make sure you are not restoring system data cause this can cause that issue as well.....
What rom did you flash?

[Q] Trouble with TWRP. Please help

I am having issues with TWRP. I have my galaxy s4 rooted and the customer recovery installed. Whenever I create a back up it works flawlessly. But when I try to do a wipe/factory reset or a restore or an install of a different rom, the system starts then the recovery resets itself. I cannot figure out what the problem is.

Bootloop after first restart with multiple CFWs!

Hi guys,
I have the standard note III 9005 and I had always installed CFWs on it.
I wanted to update to newer 6.0.1 Roms (had 6 roms before) but I seem to have a VERY annoying bug:
I tried to install Temaseks rom and resurrection rom but I had huge issues with it. I got bootloops although I got the newest 3.0.2.0 Team Win Recovery Project
I installed rom, GAPPS (correct version of course 6.0.1) , install rom again then delete cache and then it worked on both roms.
So a simple "install rom, GAPPS, then clean cache" didnt work. I tried to install multiple times until I got the installation! YAY! BUUUT!
Here is the fun part:
If I restarted the phone acidentally or on purpose I got stuck in a bootloop. After that the phone was unuseable again so the installation was useless.
Only solution is to completely wipe and reinstall and experiment with the order of installation until it works!
I did install STOCK rom because I was so freaked out and then went with ODIN the complete rooting guide for clean rooting, but still problem exists.
I tried two other roms but the problem was that while flashing the phone restarted automaticly and then TWRP said no installed rom? ???
Huge thanks for helping me!
New info:
I was able to make the rom work. I restarted and got stuck into bootloop!
I could boot normally after deleting dalvik cache!
But after rebooting I got into bootloop. Tried deleting cache again but this time it never booted properly.
How can I avoid by always deleting dalvik whenever I have to restart my phone (if battery dies or purpose)?
PPS: Stock Rom flash works flavlessly. I am waiting in stock rom until I find a proper solution :"(
Suggest you read the roms faqs and Q&A particularly with regard to TWRP .

Android Random Reboot on recovery TWRP, even when installing a ROM

Hi guys, I'm experiencing something strange with my S5. I was trying the Resurrection Rom and it had more random reboot, even bootloop for 1 hour, then after taking out the battery and wiping cache it restarted. After that I want to change the ROM with the Lineage. When I try to install it, the gapp installation stop at about 75%. I had reset the phone and restart with wipe, and rom installation, and also now the rom installation stopped. I tryed also to revent to the stock rom but I've always a boot loop. Tryed again to installa Lineage but I've always the installation that stop, and then it reboot and go in boot loop. Also to enter in recovery, I need to try several time, also removing battery. Now always it enter.. Or may be that I see the message, rebooting in recovery, but after a minute the phone restart.. What may be? I never see something like that.
Try to flash a firmware by odin.
Or change your recovery.
Good luck mate
Franck

Can't install any new rom on Samsung S8+

I have gone the nuclear option, completelty wiping the OS on TWRP, but everytime I try to install either the latest stock firmware or custom roms, the phone freezes and installation crashes. Any help?
EDIT: It seems to crash when extracting new system

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