It can be rotated 90 degrees. The three resetting methods of Lumia are as follows:
Method 1:
Set-about-Reset directly.
Method 2:
Perform the operations on the phone. The following operations will delete all the materials.
1) Turn off the power, hold down the volume and connect to the charger. If yes, an exclamation point (!) is displayed (!).
2) press the following buttons in sequence: volume increases, volume decreases, power keys, and volume decreases.
3) the mobile phone will reset and automatically start up.
Method 3:
(The best way !)
If the reset button of your phone does not exist, the volume key is also broken, and this method is still valid.
1) Disable mobile phone screen Rotation
2) go to Mobile Phone settings-about-update demo content
3) face your phone
4) perform the following operations in sequence: Rotate 90 degrees left, 90 degrees right, 90 degrees right, and 90 degrees left.
5) The phone will prompt you to select yes or no. Select yes and the phone will be reset.
Note: The mobile phone screen must be rotated left or right along with the operation.
(I have to admire Microsoft's solution for being so thoughtful ......)