Rooting in the Android world is common place, even among less seasoned users. The reasons for this usually unauthorized process are myriad, but it all boils down to getting more control and sometimes removing the cruft left by OEMs and carriers. Normally, there are very little adverse side effects to rooting an Android device, but there are a few gotchas as well, especially when it comes to Samsung’s devices. The latest word is that rooting your fresh new Galaxy S6 or Galaxy S6 edge will lead you to lose out onSamsung Pay.

To some extent, that isn’t exactly surprising. Samsung Pay most likely relies on KNOX, Samsung’s security framework, and KNOX is notorious for not playing well with rooted devices. Technically, rooting on Android is indeed a form of security exploit, so naturally Samsung KNOX would see this as a violation of trust. And considering a mobile payment system is dependent on that trust, it’s only reasonable to expect it not to work when a phone’s security has been seemingly compromised.
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https://www.slashgear.com/rooting-the-galaxy-s6-unsurprisingly-disables-samsung-pay-22380188/