In 2015, Galaxy S3 is a quite old device. It was introduced in 2012, with a lot of supporters around the world. I think it is the best smartphone of Samsung ever. And in 2015, it is still a good phone with latest software update from other developers
These are my combinations of roms, kernels, mods and tweaks of my Galaxy S3 (i9300). I think it is the best combination ever, with good performance and experience. Remember that this is my own opinion, so maybe it won't appropriate with somebody. Anyway, let's get start!!!
ROM
Cyanogenmod is undoubtedly the most popular and best-performance rom ever. It is based on Stock Android, so it runs very smooth and has brilliant performance, especially in Benchmark Test. Android 5.0 Lollipop is released, then our S3 has a very good CM12 rom with latest software version. I have used this rom for 4 months, and I do not expect anything more about my phone because it runs PERFECTLY.
Link for Cyanogenmod 12 rom: http://forum.xda-developers.com/gala...od-12-t2936990
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KERNEL
Since Siyah kernel is end-of-development, Boeffla Kernel is a perfect alternative. This kernel brings us a lot of things : change CPU governers, overclock CPU (up to 1600 Mhz) and GPU (640 Mhz), sound tweaks, undervolt CPU and GPU, etc. It lets us to control our devices freely and effectively. It also gives us brilliant battery performance.
Links for Boeffla Kernel i9300: http://forum.xda-developers.com/gala...27-03-t2449408
MODS
When I bought my Galaxy S3, I soon realized that is had a poor sound experience. So I looked for a sound mods that it improves my phone speaker. And fortunately, I have found a thread that had an amazing work: ACID Audio Engine. It gives me many positive improvements with i9300 sounds, and I have the best sound experience ever.
Link for ACID Audio Engine mod: http://forum.xda-developers.com/gala...msung-t2002197
APPS & GAMES
I am a student, so I do not have much working or business apps. These app below are mostly entertaining apps : music, games,
Google Camera: easy, simple and functional interface
https://play.google.com/store/apps/d...d.GoogleCamera
Inbox by Google: a beautiful Material Design email app, and officially published by Google
https://play.google.com/store/apps/d...oid.apps.inbox
Google Keep: easy for taking notes with texts, images and many cute symbols
https://play.google.com/store/apps/d...e.android.keep
Zedge: up-to-date beautiful wallpapers, ringtones and other stuffs.
https://play.google.com/store/apps/d....zedge.android
Wolfram Alpha: as a student, I have to do a lot of calculating exercises. This app is my perfect assistant at school, especially in Maths lessons.
https://play.google.com/store/apps/d....android.alpha
Fenix: my daily Twitter app
https://play.google.com/store/apps/d....android.fenix
Seeder: it is undeniable that many Android devices become slower and slower after long time using them. Seeder helps us to prevent this problem. It gives us a smooth experience with no lags and FCs.
http://forum.xda-developers.com/show....php?t=1987032
Xposed Installer + Gravity Box(LP) : best apps for interface editing, mods, and tweaks
http://forum.xda-developers.com/show....php?t=3034811
Ram Manager Pro: a lot of RAM options, swap RAM (up to 2GB), friendly interface.
https://play.google.com/store/apps/d...timizationFree
FIFA 15: Since FIFA 16, in my opinion, is not as good as FIFA 15 (graphics problems, worse user interface, ), I am still playing with my own Ultimate Team. Best Sport app ever.
https://play.google.com/store/apps/d...ame.fifa15_row
Asphalt 8: Racing games with a lot of cars, roads and game modes, brilliant graphics.
https://play.google.com/store/apps/d...ANMP.GloftA8HM
Leos Fortune: This is the best graphics games ever
https://play.google.com/store/apps/d...om.leosfortune
TWEAKS & SELF-EXPERIENCE
These are my combinations of roms, kernels, mods and tweaks of my Galaxy S3 (i9300). I think it is the best combination ever, with good performance and experience. Remember that this is my own opinion, so maybe it won't appropriate with somebody. Anyway, let's get start!!!
ROM
Cyanogenmod is undoubtedly the most popular and best-performance rom ever. It is based on Stock Android, so it runs very smooth and has brilliant performance, especially in Benchmark Test. Android 5.0 Lollipop is released, then our S3 has a very good CM12 rom with latest software version. I have used this rom for 4 months, and I do not expect anything more about my phone because it runs PERFECTLY.
Link for Cyanogenmod 12 rom: http://forum.xda-developers.com/gala...od-12-t2936990

Since Siyah kernel is end-of-development, Boeffla Kernel is a perfect alternative. This kernel brings us a lot of things : change CPU governers, overclock CPU (up to 1600 Mhz) and GPU (640 Mhz), sound tweaks, undervolt CPU and GPU, etc. It lets us to control our devices freely and effectively. It also gives us brilliant battery performance.
Links for Boeffla Kernel i9300: http://forum.xda-developers.com/gala...27-03-t2449408
MODS
When I bought my Galaxy S3, I soon realized that is had a poor sound experience. So I looked for a sound mods that it improves my phone speaker. And fortunately, I have found a thread that had an amazing work: ACID Audio Engine. It gives me many positive improvements with i9300 sounds, and I have the best sound experience ever.
Link for ACID Audio Engine mod: http://forum.xda-developers.com/gala...msung-t2002197
APPS & GAMES
I am a student, so I do not have much working or business apps. These app below are mostly entertaining apps : music, games,
Google Camera: easy, simple and functional interface
https://play.google.com/store/apps/d...d.GoogleCamera
Inbox by Google: a beautiful Material Design email app, and officially published by Google
https://play.google.com/store/apps/d...oid.apps.inbox
Google Keep: easy for taking notes with texts, images and many cute symbols
https://play.google.com/store/apps/d...e.android.keep
Zedge: up-to-date beautiful wallpapers, ringtones and other stuffs.
https://play.google.com/store/apps/d....zedge.android
Wolfram Alpha: as a student, I have to do a lot of calculating exercises. This app is my perfect assistant at school, especially in Maths lessons.
https://play.google.com/store/apps/d....android.alpha
Fenix: my daily Twitter app
https://play.google.com/store/apps/d....android.fenix
Seeder: it is undeniable that many Android devices become slower and slower after long time using them. Seeder helps us to prevent this problem. It gives us a smooth experience with no lags and FCs.
http://forum.xda-developers.com/show....php?t=1987032
Xposed Installer + Gravity Box(LP) : best apps for interface editing, mods, and tweaks
http://forum.xda-developers.com/show....php?t=3034811
Ram Manager Pro: a lot of RAM options, swap RAM (up to 2GB), friendly interface.
https://play.google.com/store/apps/d...timizationFree
FIFA 15: Since FIFA 16, in my opinion, is not as good as FIFA 15 (graphics problems, worse user interface, ), I am still playing with my own Ultimate Team. Best Sport app ever.
https://play.google.com/store/apps/d...ame.fifa15_row
Asphalt 8: Racing games with a lot of cars, roads and game modes, brilliant graphics.
https://play.google.com/store/apps/d...ANMP.GloftA8HM
Leos Fortune: This is the best graphics games ever
https://play.google.com/store/apps/d...om.leosfortune
TWEAKS & SELF-EXPERIENCE
- CPU governer: ondemand
I/O Scheduler: deadline
Max freq: 1400 Mhz
Min freg: 200 Mhz
Undervolt CPU: -75mV
- GPU freq: 160/266/350/440/533
GPU undervolt: -75mVBuild.prop tweaks:
- Fast Reboot
persist.sys.purgeable_assets=1
Render UI with GPU
debug.sf.hw=1
- Increasing It Will Make Mobile Smoother
windowsmgr.maxevents_per_sec=150
- Video Acceleration Enabled
video.accelerate.hw=1
- Increase Performance
debug.performance.tuning=1
- Disable Sending Usage Data
ro.config.nocheckin=1
- Deeper Sleep / Better Battery Life
ro.ril.disable.power.collapse=1
pm.sleep_mode=1
- Disable BootAnimation
debug.sf.nobootanimation=1
- Faster Scrolling
ro.max.flingvelocity=12000
ro.min.fling_velocity=8000