英文關鍵字
4g
application
bad
call
calling
cell
cellphone
cellular
close
closeup
communication
connection
contact
conversation
dial
displeased
dissatisfied
elderly
female
gadget
grandmother
international
internet
mobile
network
news
old
online
operator
pensioner
person
phone
provider
retired
roaming
senior
service
smartphone
talking
tariffs
technologies
telecommunication
telephone
unhappy
up
upset
using
wireless
woman