iPhone SE heats up when in a call or browsing the web

hello,

i have an iphone SE.it works perfectly well until make a call from it.

it begins to heats up as soon as starting a call (happens on both 3G and normal network.)

my dcps shows 1amps-1.8amps draw when making a call.no signal issues at all. 4n was water damaged but no indication of fungus or corrosion.already changed ‘‘QFE1100’’ with same result. ‘‘L4003_RF’’ is the first to get hot and it cant be touched.very hot.any guidance would be highly appriciated.thank you very much.