access
aerial
antenna
antennae
bad
bar
beacon
black
cellphone
connection
connectivity
error
fi
gsm
hotspot
icon
indicator
interference
internet
jam
level
low
malfunction
network
no
no signal
offline
problem
prohibition
remote
restricted
restriction
router
shape
sign
signal
strength
symbol
technology
transmission
transmit
waves
weak
wi
wifi
wireless