5-10 secs wake up lag when im on latest firmware like 2017 base kernel
how to fix tell me ?
Yeah, that's common on those...
Here are some suggestions to get you started:
Try cleaning your device with Clean Master app
Probably the easiest and the first thing you should do. Here's the app - https://play.google.com/store/apps/details?id=com.cleanmaster.mguard&hl=en
Increase the minimum processor frequency
Here's more info on how to do that - http://www.naldotech.com/how-to-overclock-samsung-galaxy-s5-processor-change-frequency/
Last but not least (and certainly not the easiest), install a custom ROM
Custom ROMs are best known for their enhancements. Do a little research on custom ROMs on Updato.com and you'll find all the basic info on how to use one, install one, etc. Here's a link to get you started - http://updato.com/custom-roms/install-custom-rom-android
Hope this helps,