Water damage indicator

[up10ad]

^^^ good luck checking the battery sensor; look at the other two, locations documented in earlier posts.

[Reefdiver72]

Caution putting bleach on your red dot will only eat the jack and anything else metal around it. I use bleach every day to make new steel rust to look like antique then clearcoat it. I can honestly say it will eat up your phone.

[llrickman]

I know for a fact from personal experience that there are 2 water sensors you can see. One in the headphone jack and one in the charging port. 3gs anyway

I was at the apple store a couple weeks ago my wife's sensor on the bottom is activated on her 3gs and she is the most careful person ive ever seen with her iPhone.

The guy ahead of us had the one in the headphone jack activated

I was told there are also two more inside the phone that your cant see unless you take the phone apart

just my 2 cents

[Reefdiver72]

I am pretty sure there are 4 of them when I had my other iPhone apart.