allowed
area
attention
background
ban
banner
button
call
caution
cell
cellphone
cellular
circular
communication
danger
forbid
forbidden
game
icon
illustration
image
isolated
label
mobile
no
not
phone
placard
prohibited
receiver
red
refrain
restricted
restriction
ring
round
rule
safety
sign
signboard
stop
symbol
telephone
telephony
use
warn
white
zone