My android phone randomly reboots, any way to retroactively read the logs?

In Windows I can use event viewer, and BAM! found the reboot cause.

How to do that in Android?

 

Log cat need to be preemptively recording

And full of useless stuff

 

It sucks battery like mad

In Windows the log is always there as part of the system. No additional overhead. No need to manually record.

 

It's not that it eats battery but it makes my cpu stays at high clock

The reboot randomly happens, I can't just left my phone there red.

 

dang, it has not restarted since i put logcat record :/

so... maybe the bug is too low cpu frequency or too deep sleep resulting in restart? because with logcat running, it seems fine.

 

It is stock Android but this phone is full of bugs and LG abandon it faster than the exodus.

One of the most ridiculous bug

LG g pro 2 advertised as 4G LTE, complete with ugly LTE label on its back cover.

But surprise! Lte mode is not available hahahahahah

You need to manually turn it on from service menu. Even worse, it will be disabled again every restart.

The solution? Root it and delete LG LTE setting apk in system partition.

Ridiculous right?

Edit:

When this phone is broken, I'll only buy phones from Sony or Xiaomi.

Guaranteed upgrade for YEARS

 

Don't care about contracts. Sony and Xiaomi has proven that they are awesome at giving updates.

Sure Sony is as slow as turtle and almost always buggy at launch, but they do update for years.

On the other hand, this Chinese brand called Xiaomi is superb

Fast update (weekly! For flagship devices)
Relatively bugless compared to LG and Sony
If there is a crucial bug, usually fixed in a day if you use DEV ROM. A week if stable ROM.

NO other Japan, Korean, American, Chinese company give update as many and as fast as xiaomi.

Edit:

What I mean by update is not only about major Android version.

But also bug fixes

Sony is slow as snail in updating major Android version, but they are quick to acknowledge bugs (usually in a week) and publish update (about a month).

 

Isn't it's the majority of Android phone in the market is hackable? There is a major bug in stsgefright that works for like all phones up to lollipop.

There's also newer bug that works for more phones but not as easily doable remotely as the stagefright exploit.

Basically, sticks to play store to be safe. Rogue apk with that exploit surely can infect majority of Android phone without hassle.

 

Yeah it got a SD card. Thanks, I'll replug it. I can't use the phone without it though, almost all my software is installed there.

 

It hasn't rebooted since I replug the SD card! Thank you!