User Agent Switch

[kunn]

I m in need if a guid -_-
How to use handler? It's so confusing pinger settings user agent and again custom user agent what to do in pinger and what to do on browser settings
There is no copy/paste option in handler it's difficult to type all the strings properly.... Is there a way to copy/paste?
Even though i changed the ua to handler ua my user agent did not change nor my phone model changed why?
Please is there an easy way to change user agent in uc browser?
Opera mini can change just copy the user agent of any phone and paste it on the menu>tools>network setting>UA
then the phone model and ua automatically change but even if i write in uc browser handler line-by-line the ua don't change....