Các tế bào connetion P7

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Các tế bào connetion P7

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ROAMING Using your cellular phone when you’re away from your home cellular service area, traveling in another, is called roaming. Virtually all cellular carriers have made arrangements under which you can simply arrive in a service area other than your own and automatically start to use that carrier’s service. There is a certain mystery surrounding roaming, and a lot of questions have arisen over what roaming is and how it works. This chapter is intended to answer those questions. HOW TO TELL WHEN YOU’RE ROAMING The boundaries that mark the end of one cellular carrier’s domain and the beginning of another’s are...

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