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Magnetic Secure Transmission

A technology that uses magnetic pulses generated by an electromagnet to recreate the data stored along the length of a magnetic strip.

It was developed for payments. A phone with MST can be held against a swipe-style magnetic credit card reader, with the MST component simulating the swipe of a physical credit card. To the magnetic sensor of the credit card reader, the magnetic fields generated by MST are identical to the fields it would sense from a credit card's strip as it is swiped through the reader.

In this way, MST enables your phone to replace plastic payment cards in your wallet, much like NFC. MST has the advantage of working with common magnetic stripe readers, instead of requiring an NFC or chip reader.

See: NFC

MST, like NFC, has a very short range of about three inches.

MST was developed by LoopPay, which was acquired by Samsung. Samsung now owns MST technology and has put it into its phones.

As banks and credit card companies migrate to more secure technologies such as EMV (chip cards) and NFC, magnetic stripe payment will be discouraged and phased out, making MST less relevant over time.

Last updated Nov 8, 2019 by Rich Brome

Editor in Chief Rich became fascinated with cell phones in 1999, creating mobile web sites for phones with tiny black-and-white displays and obsessing over new phone models. Realizing a need for better info about phones, he started Phone Scoop in 2001, and has been helming the site ever since. Rich has spent two decades researching and covering every detail of the phone industry, traveling the world to tour factories, interview CEOs, and get every last spec and photo Phone Scoop readers have come to expect. As an industry veteran, Rich is a respected voice on phone technology of the past, present, and future.

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