the compass is not working on my A05s, gps works fine so does altimeter, but not the compass it stuck facing N. i cant find anything or anyway to calibrate it

i have read it can be done by going into edge panel but the A05s does come with edge pane, what can i do?, all my previous smart phone have a default tools or calibrate app install for this job but seem not this phone.

any help would be welcome

thanks