The element that makes iPhone different is its capacitive screen, which reacts to finger movements by sensing electrical currents around the finger instead of pressure points. This means a usual stylus, or fingernail, will not work with iPhone since operating the device does not require pressure but touch. Therefore, if you need an iPhone stylus, you have to get one that is specifically designed for the device to make sure it works.
On the contrary, most of today’s touchscreen phones, such as HTC Touch Pro, HTC Touch Diamond and Samsung Instinct, apply the most common touch-resistive screen. Made of two layers of glass or plastic, the screen detects and determines the pressure points for operation. You can easily do it with your finger, bare or gloved, or any stylus pen.
In fact, not only should iPhone users pay extra attention to pick the correct iPhone stylus, but users of other touchscreen phones should also make their choices carefully since there are countless choices out there. Here are some of the common ones on the market.
4-in-1 PDA Stylus Pen

Bluetooth Stylus Pen

The Bluetooth Stylus Pen is a hands-free device that can fulfill both purposes of a stylus pen and a Bluetooth headset. Besides serving as a PDA stylus that works with all Bluetooth-enabled PDAs and cell phones, it is also a Bluetooth headset with a built-in speaker and microphone.
Universal Retractable Stylus Pen

This universal retractable stylus pen, being retractable, can be extended to a more comfortable length to fit the user and is compatible with all PDAs and PDA phones. It also comes with a little strap, so users can attach it to their PDA devices.
Finger Stylus

Made of soft plastic, Finger Stylus can work with all kinds of touchscreen devices including PDAs, PDA phones, GPS or point-of-sale (POS) systems. While wearing the Finger Stylus, users can simply use their fingers to tap the screen for convenience instead of holding a stylus pen. The soft plastic tip can also prevent accidental scratches on the screen.
Tags: Stylus, iPhone Stylus, HTC Stylus, Palm Stylus, 4-in-1 PDA Stylus Pen, Bluetooth Stylus Pen, Universal Retractable Stylus Pen, Finger Stylus
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