The gadget has a built-in battery which is conveniently rechargeable and is not replaceable, dissimilar to almost several mobile phones existing. Once the battery has reached the end of its life in a premature state, ideally, the phone can be returned to Apple and be replaced for another but must still be within the given warranty time – usually about one to two years from the time of purchase. If the warranty has already expired, one can replace new battery although he or she has to pay for it, shipping charges included.
Originally, the equipment showed its SIM card in an open slot being ejected. For those countries having the gadget, the device is sold with a SIM lock that prevents the use of SIM cards to other networks.
Initially, iPhone was released with 2 options for its internal storage which can either be 8 GB or 4GB. Time came when Apple announced that models having only 4 GB memory are going to be discontinued in its circulation to give way to a more expanded and reliable storage.
Other items and accessories are already included upon purchase of the iPhone and iPhone 3G. Some of the accessories would include headset and microphone, cleaning cloth, dock connector, a USB adapter, and a SIM ejector tool. Some of these are made exclusively for iPhone 3G and some are present in both models.