Okay! You need to act fast. Here’s what you do:
1. Get your hand straight in there and fish it out.
2. Quick wipe with towel.
3. Remove the battery as fast as you can.
4. Another wipe with towel.
5. Give the phone a good long shake until as much water as possible is removed.
6. Place the phone in a warm dry place such as in the airing cupboard (make sure it’s not so hot that it melts).
7. After 24 hours replace the battery and pray that all will be well.
If it’s an iPhone you’ll struggle to get the battery out in a hurry. Long term damage will be more likely.
My HTC Desire survived. Share your experience below.