I dontīt know how clever that is as the release notes clearly states not to update that way. Code: NOTE: If you have a Sony Xperia X dual SIM device (model F5122) running Sailfish X already, please install the official F5122 image of this update 2.2.0.29 (by "flashing" the device - see chapter 6 in https://jolla.com/sailfishxinstall/). Do not try to update your device over-the-air, as your existing device software was never meant to be used in F5122 devices. Flashing the device with update 2.2.0.29 now will ensure that it will work fine and that upcoming over-the-air updates can be installed successfully.
NOTE: If you have a Sony Xperia X dual SIM device (model F5122) running Sailfish X already, please install the official F5122 image of this update 2.2.0.29 (by "flashing" the device - see chapter 6 in https://jolla.com/sailfishxinstall/). Do not try to update your device over-the-air, as your existing device software was never meant to be used in F5122 devices. Flashing the device with update 2.2.0.29 now will ensure that it will work fine and that upcoming over-the-air updates can be installed successfully.