I don't know if the subject is already actual... but, as nobody (more competent than me - means most people on this forum) answer, i try to :
Personnly, i meet not this on my device.
do you try to activate (& change) the PIN on the android device and go back to the ut one ?
if don't works, do you try to re-install UT on your device ?
does it can come from your opeator : pearaps some of them considere UT device not as phone ? (but as objects or 4G box). So they could treats it differently.