So it looks like I too have an 'X' that's suffering bad cell connection issues 😪 I've done a full system reset and after only connecting to WiFi (to complete basic setup) & installing the Edge browser I'm now using + CX file explorer, I've tried to make & receive calls.
Basically, the handset is totally unreliable. It hadn't suffered the bad call quality, or call drop outs, that I've seen others have complained of (prior to reset); it just seems to be utterly, horrendously, unreliable at holding cell connection in order to receive incoming calls. & while I initially attribut