2.select display language to Telugu (this step is not necessary)
3.under that tick the Box for "Enable Input tools"
4. Now select the(all telugu fonts) languages you want to use for texting in Input tool settings
5.save everything and open compose or chat window.
6. switch between telugu and english by the button provided left to the settings
7.during chat if you are not getting the right word as first option, then use the
other options numbers to select them by pressing that particular number.