What size SIM does my Cellferno take? 25 May 2021 23:04 Updated Cellferno is only compatible with Standard SIM size Related articles How do I setup APN on my Cellferno? What should I do before installing a Cellferno unit? How to check tower signal status in Cellferno What do the LED lights mean on my Cellferno? How many Cellferno models are currently available?