Thanks for the input. That will be easy to check when my phone arrives next Friday by just holding them together. I've had problems removing the bumper from my XS. This slight size increase could cause trouble. I contacted Thanotech about the K11. Their very nice support person said it's not recommended because protection would be compromised. She said new models are on the way. They of course want us to buy new bumpers, not use the old ones. The only thing at risk may be the camera bump is bigger and sticks out further.