Can the iPhone 4s camera be installed in the iPhone 4?
Just as the tittle says.
Can the camera be installed on the iPhone 4 to "upgrade" the camera?
第四代iPhone。维修过程直观易懂，但前置玻璃和LCD面板无法分开，只能作为同一零件更换。GSM版本， 8, 16, or 32 GB 容量 / 型号 A1332 / 黑色或白色
Just as we expected, the connector for the camera on the iPhone 4S is different than the connector on the iPhone 4 (CDMA and GSM). This means that you cannot "upgrade" your camera in your iPhone 4 (or downgrade your 4S if for some odd reason you can't handle the 8 megapixel camera). The iPhone 4S connector has more pins. Even if it did fit, I don't think it would work anyways.
iPhone 4 (CDMA and GSM Side-By-Side):