Are you sure the MediaPad M6 LTE 8.4 inch allows to make and receive phone calls? And it also allows to send and receive SMS? There seems no one who says the LTE has this functionality. Can someone who actually has the LTE version confirm this?
On the alternatives:
I can currently hardly use my two pieces M6 (10"). I'm expecting two Mi Pad 4 Plus (by Xiaomi). I have one already, and I love its responsiveness. However, no stylus, merely Full HD, in the Global edition no OTA updates.
The Mediapad M6 can be used with (at least) Huawei's M-Pen Lite.
I have not yet been able to see if this combination has pressure sensitivity. (I hope so, I think so. I can't download my purchased and relevant apps from the Play Store. :-(