Attention: iPhone 3GS may explode due to the battery issue
After 3 years' use, the battery expanded by itself when charging, if i did not stop charging immediately, high chance it will explode.
Have called Apple's customer service, was told it is already out of warranty, even if it exploded, there is nothing to do with them. Very disapponted about their response, will not continue to buy apple products in future.
iPhone 3GS