Android tablet in kiosk mode

Instal android tablet to work in kiosk mode as remote display. Used Lenovo Tab One. Worked great on my driveway (I used my home wifi to install kiosk mode). But when I left house - it lost connection (I am guessing to Venus-… wifi). My phone however sees the Venus-… wifi. Is it somthing wrong with Tab One? Seems people having better luck with Lenovo M9. Just ordered Lenovo M9. Please note - I using Victron GX LTE. Works great. But is GX LTE causing problem? Please advise.