We've never had a particular problem with the speaker or earpiece on previous iPhones (well, the speakerphone has never been loud enough for our taste), but it's obvious that Apple has done some work on getting both call quality and speakerphone quality up. Beyond making the phone considerably and consistently louder in both places, the clarity of the iPhone 4 is noticeably improved from the previous generation. If you read our review, then you know that we thought Motorola's original Droid had some of the best sounding components we've heard on a phone, and the new iPhone definitely gives them a run for the money. There's clearly a difference between the sound in the earpiece on the new phone versus the 3GS, and it ranks highly against newer competition like the EVO. As far as the speakerphone goes, it gets loud without distorting or producing cutting midrange, a problem we've noticed on quite a few recent phones. We'd liken the iPhone 4 in quality to something along the lines of the BlackBerry Bold -- a bearable tone even when it gets hot. It a nut shell, lets face it, there is nothing like the iPhone 4 and frankly I love the device and personally would not consider another device. I love the simplicity and ease of use.
As for repairs needed on the iPhone, Tech Accessory Zone offers an exstensive repair service for the iPhone and that ofcourse includes iPhone 4 repair. We are based here in Tampa and offer not only cell phone repairs, but also iPhone 4 cases, iPad cases and a large range of cell phone accessories. http://www.techaccessoryzone.come/ We at TAZ are also proud to announce that we now carry and sell Clearwire 4g high speed wireless internet that carries large data and is completely mobile. Clearwire offers are available at Tech Accessory zone and we ecourage you to stop by our store in Tampa on North Dale Mabry Highway so you can get a look at the Clear wire modem and 4 g laptop aircards etc http://www.techaccessoryzone.com/html/iphone-repair-in-tampa-h.html please see the link to clearwire http://www.techaccessoryzone.com/html/clearwire-f5.html