No sound from iPhone 4.

The jacksucking method (sorry if that sounds obscene!) mentioned in bibou11's link at the start of this thread worked for me. I was caught in a heavy downpour, with my bag open and the top of my phone unknowingly exposed. I let it dry out gently, (still no sound), then sucked a few times, and, hey presto, all back to normal!!! So glad I check this forum, as my iPhone 4 is, guess what, just out of warranty by 2 weeks and I was beginning to panic! Keep up the good work, guys, and thanks again.

SLS

The trick to lock the phone and double click on the main button, then press play and pause of the music just worked for me.

However, I cannot understand why it has to be done.

My iPhone 4 is brand-new (from Apple Store, two weeks ago).

Thanks for this link

http://support.apple.com/kb/TS1630

I had the same problem with my aging i phone 4. I solved it by going to settings and turning off the bluetooth. No idea why this was the problem, or why it worked, but it did! Sound back to normal

My iPhone 4 had no sound all of a sudden. When I received a call, they couldn't hear me and I couldn't hear them. This is how the Apple Genius fixed the problem:

Settings

General

Reset

Reset All Settings

Simple, and it WORKED!! I was so relieved I didn't need to get a new phone.

Thanks alot ur like a saver i had the same probleme untill i read ur solution

Tried all the solutions that I found online except for jailbreaking the iPhone 4s or shredding it in a blender. After wasting about 6 hours worth of time resetting, restoring, squeezing, blowing, sucking and cleaning my dock connector with alcohol, I decided to take the phone to a reputable iPhone repair shop in Chicago on Southport Avenue. They had my phone's dock connector replaced in 30 minutes for around $60US and it includes a lifetime warranty. The problem could only have been fixed with a replacement. There are two pairs of micro-transistors located over the metal dock connector compartment, not accessible from the exterior. The transistors were both coated with a white "muck", apparently due to heat, humidity, moisture, etc.

Thank you!

Clean Your Ringer Flex Cable With Alcohol Or Other Lequid Then U Can Slove Your Problem (Y) Try This

I had the same issue with no sound on iphone 4. After trying almost everything someone suggested that I should reset all settings and disable access to the icloud. The reason to disable access is that there might be bug on icloud and after reseting, your phone will automatically take the data from cloud including the bug. Unfortunatelly you will lose your data but the problem should be fixed. It worked for me.