Why can't I go back to KitKat the operating system my device came with?

[AC Question]

why can't I go back to kitkat the operating system my device came with

Ever since the lollipop came out my phone experience has been hell it's a terrible system full of bugs and issues can't even reply to an email the autocorrect is terrible adds things like dots some copy and paste thing pops up screws things more etc

 

[belodion]

Re: why can't I go back to kitkat the operating system my device came with

Have you tried a Cache Partition wipe, or even a Factory Reset?

 

[Rukbat]

Re: why can't I go back to kitkat the operating system my device came with

If you can't get KitKat back on the device, why depends on which device.