From @Dev4Mod's post on unlocking the ROG Phone 6 bootloader, and @blackbile's post on finding the swVer
DISCLAIMER: I WAS NEVER, HAVE NEVER BEEN, AND WILL NEVER BE RESPONSIBLE OF ANY DAMAGES AGAINST YOUR DEVICES BY YOUR OWN MIS-OPERATIONS...
The limitation is not tech, it’s the cost to include those features in an IP68+ device. The XR21 is a $650USD phone, that’s near flagship prices, and very far from a budget phone.
Is it possible to create a device that has a jack, SD slot, and removable battery that’s also IP68+ certified? Absolutely, but doing that is quite a bit more expensive than the same features on an IP67 or lower device.
It’s not that it’s impossible, but the device will be both more expensive, and considerably thicker. Most people do not care about a headphone jack anymore, and even less so SD card slots and removable batteries. They want thinner, cheaper, waterproof phones. These features aren’t in high demand, and aren’t profitable for companies to produce.
The limitation is not tech, it’s the cost to include those features in an IP68+ device. The XR21 is a $650USD phone, that’s near flagship prices, and very far from a budget phone.
Is it possible to create a device that has a jack, SD slot, and removable battery that’s also IP68+ certified? Absolutely, but doing that is quite a bit more expensive than the same features on an IP67 or lower device.
It’s not that it’s impossible, but the device will be both more expensive, and considerably thicker. Most people do not care about a headphone jack anymore, and even less so SD card slots and removable batteries. They want thinner, cheaper, waterproof phones. These features aren’t in high demand, and aren’t profitable for companies to produce.