Can't boot my android - Android Q&A, Help & Troubleshooting

Hi i am on Galaxy Grand Prime rooted,
i have 0 knowledges about android but i did something terrible.. i felt that there was a virus in my phone( there was "Firewall security" pop up every x minute.. ) so i have scanned my phone with 360 security and i was right .. as i remember it was an apk file and the location was /system/priv-app/... my phone was rooted so i deleted with a root explorer the priv-app folder!!! everything stopped and now my phone cant boot (it stuck on the samsung logo) i can enter the recovery mode but i don't know what should i do.
i don't know anything about odin/flash etc.. so please explain to me from scratch or refer me a link based on this situation what i have to do should i factory reset from the recovery? will it work? Thanks
sorry for my bad english

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[Q] app changed system files, stuck on bootup

Dear xda forums.
Unortunatedly, this is my first post and i will be asking for help rather than helping :/
So... my father came in a week ago with a chinese android phone that i cant tell what phone it is trying to replicate exactly.... thing is, no matter how much i look for this phone i cant find anything about it, i already searched a lot on how to fix this proble but to no avail...
I can give more details if you need them), but basically this is my problem:
I got a chinese phone that runs on 4.2.2, and after working a lot, i managed to install supersu via framaroot(superuser would not work properly).
Thing is, being the inpatient person i am, before backing up anything, or installing a recovery rom or any costum rom, i decided to check some apps that required root.
I downloaded the app anim mod *root* because i thought it was a good idea to change the animations of my phone
HERES THE PROBLEM i used this app and i could see how it was changing things in my system files, it then asked for a reboot, and now it wont get past the boot animation and it freeses right there, i can enter factory mode(which is in chinese and i did look up for a translation) and recovery mode:
In both modes i was able to reset the phone but the problem is still there, ive literally have been searching whole days now and i am quite frustrated.
My question: what should i do to fix this? i have root but no recovery rom , so is there a way i can install a costunm rom just to try?
If the case is that i changed a system file (animations) how can i change them through my pc? does a reset from the stock recovery reset the system files aswell?
I am new to this, but i am willing to learn and try everything that could fix this.
If anyone wants to help, you can ask me whatever you want, i can upload pictures if you want to help me identify it or the specs i managed to get from factory mode.
the phone says it is an alps model a76, but thi phone is nowhere to be found help me please

[Q] Bricked Android

Hey
I did something really stupid today, and i am hoping to get some help.
I recently bought an Galaxy S4 replica (gt-i9500), from Mediatek. It was working fine at first and looked like a pretty stable replica but it had some apps and stuff i didnt want so i did a factory reset. After that a Mediatek logo loaded up every time i would turn my phone on, (when i got it it would only display the stock samsung logo). I read a couple of articles on the internet which said you could change that by replacing the boot_logo on (device/media/images) But I accidentally deleted a folder named ''bin''. I had already made a copy of all system directory on my sdcard so i tried moving "bin" back to its place but that didnt work. And now the phone wont turn on at all, it just displays the stupid Mediatek logo.
What can i do? Did i brick my phone?
P.S The phone was rooted with Framaroot.
I was able to get it to Android system recovery and i was wondering if i could install an new rom from the sd card. I dont know what ROM should i choose, will cyanogenmod work on it???? Or if someone could find me an stock ROM for it... Please help me because i dont what to do.

[Q] help

I have done a big error on my chinese phone z868 I put the wrong build.prop inthe system and now impossible to put the good file.
My phone is rooted but adb or android commander not in root and I can't use my phone in recovery the factory reset don't walk
What can I do? thanks

D: BAD RESOLUTION help, id like tofactory reset but cant get into phone!!!

hi guys, ive soft rooted my galaxy ace 4, I thn downloaded rom toolbox lite then found a cool button that said pixel density then I put tht up to max thinking it would be a good idea but now I cant get into my phone and would like to either factory reset or just change that setting back somehow, I'm a somewhat noob with basic root and device knowledge so please excuse me if I do not comprehend, my device powers on fine and everthing its when it fully on that I get a notification saying, "unfortunately com.android.systemui has stopped, and my resolution is way too big, is there an easy way to factory reset even though I cant get into the phone to change setting, it connects to my pc but adb says the device is unauthorized see dialog box, so I'm out of ideas, if someone can help before 11th august (I'm going on holiday) then that would be amazing!
thanks everyone!
btw I don't have twrp or cwm cuz I didn't install them I'm dumb ik,
also if there is a way to factory reset easily from pc or anything, like if I hold the power and volume it should put me in bootloader but it says warning installing a custom rom could be dangerous don't remove target.
please help
thank you
You can install twrp or cwm with odin and from there do a Factory Reset. I don't have the files. But you can search them.
Sorry if i didn't help.
Sent from my SM-G313HZ using XDA-Developers mobile app

Need rom for prestigio psp5454duo Phone reboot and freeze

Hi im new so sorry in advance for misspells or being a noob
I have a Prestigio Multiphone psp5454duo nice phone work pretty well until a root it for the second time using kingroot and the phone went crazy rebooting and freezing!
i look for a rom to replace it but i got 0 results i berly found some info in a custom recovery someone said its compatible with one of the nexus recovery KTU84P (This is the build id )
the board its a msm8916 dual sim
I recently backup the partitions on the phone using partition backup if any developer wants then but the system in unstable reboots randomly, after a factory reset it still reboots randomly, no more freeze for the moment.
I love cyanogenmod if anyone knows if its compatible with this phone can you pls provide me with a download link ???
or any other working rom
Allso the bootloader i tink its lock i found a file to unlock it on a russion forum but was not able to download it with out an account and i am unable to make one since i dont know russion (google translate does not want to translate the registery page!!!)

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