Columbia subject headings:
Cell phone equipment industry--Rates.
Cell phones--Rates.
Competition.
Mobile communication systems--Rates.
Telecommunication--Rates--OECD countries.
Harvard subject headings:
Cell phone services industry--Rates.
Cell phone systems--Rates.
Competition, International
Mobile communication systems--Rates.
Telecommunication--Rates
Princeton subject headings:
Cell phone equipment industry--Rates.
Cell phone systems--Rates.
Competition.
Mobile communication systems--Rates.
Telecommunication--Rates--Organisation for Economic Co-operation and Development countries.