Austin, TX -- (ReleaseWire) -- 03/05/2014 -- Discontinued phones that are still available online are not easy to find in like-new condition. It's a good idea to make sure the phone also comes with a charger, warranty, and free shipping. Finding used cell phones in excellent condition, and a large selection of Samsung, Apple, Sony, LG, etc. is not always easy, but MobileCellMart.com has a large selection.
The features of the iPhone 3GS are mainly internal changes regarding speed, for which the "S" in "iPhone 3GS" stands. The iPhone 3GS is speedier and is 2x faster than its predecessor. Though in addition to the upgrades mainly regarding performance, various software features were also introduced exclusive to the iPhone 3GS such as Video Camera, Voice Control and Digital Compass. All of its exclusive features were incorporated into the iPhone 4.
A magnetometer is also built-in the iPhone 3GS, which is used to measure the strength and/or direction of the magnetic field in the vicinity of the device. Sometimes certain devices or radio signals can interfere with the magnetometer requiring users to either move away from the interference or re-calibrate by moving the device in a figure 8 motion. The iPhone 3GS also features a Compass app which was unique at time of release, showing a compass that points in the direction of the magnetic field.
MobileCellMart.com is a Texas based company that provides discontinued used and new cell phones for all major carriers including Sprint, Verizon, T-Moble, and AT&T. All phones come with New Wall Charger, 30 day warranty, and Free Shipping.