cellphones or mobile phones

no mate...i think there will always be a risk if you turn it on...

short circuit

short circuit may happen when small wires cannot handle or resist the load of the current that passing through it....because of high temperature (heat)

it doesnt really mean that it didnt damage the phone after it was dunked in the water..still short circuit happened...but it didnt damage the phone critically..i mean..if your phone is complex circuit (millions of connection)...the only one that got affected was only a small part of it(maybe 1-5 of connections)..well the connections are combination of series and parallel...but if its parallel...it will still work...because even if one fails other can still do the job...

the reason why you shouldnt turn it is to minimize the damage...you got question just asked..leave your email so that i can email it to you...