9F7E

Mobile Support Indicator is a single byte the card presents to signal what it supports and requires around on-device cardholder verification - the class of CVM performed on a phone or wearable itself (a fingerprint, a PIN entered into the device, a face unlock) rather than on the terminal's own PIN pad. It's related to the Card Transaction Qualifiers (9F6C, though that specific tag is Visa/Kernel-3-scoped) and to the Application Interchange Profile (82) in the broader sense that all three describe what verification options a given contactless transaction actually has available - 9F7E is Kernel 2's own version of communicating that a phone-based CVM already happened or is required, distinct from 9F6C's equivalent role in Kernel 3. Scoped specifically to Mastercard PayPass (Kernel 2) per the card's brand data, it won't appear on a Visa qVSDC contactless transaction, which instead relies on the CDCVM-related bit already present in 9F6C for the same underlying concept. A reader that doesn't understand 9F7E will simply not present a device-based CVM option, silently falling back to whatever other CVM the card and reader both support instead. See EMV Contactless Book C-2.