find and destroy those responsible
remove the battery and sim and SD card
depending on how long it was immersed you can either swab the outside of the phone in alcohol or give it a dunk since it was already drowning in soda. You want to allow the alcohol to eat up any sugar
next place the battery and phone into dry rice, cover it completely .
let it sit in the rice for 2-3 days
on day 3 or 4 you can try to power up the phone so long as every molecule of moisture is gone. Pray hard. If you have not succeeded in step 1 then anyone in the immediate vicinity will do