The phrase "an existing phone" is correct and usable in written English.
You can use it when referring to a phone that is currently in use or available, often in contexts involving upgrades, replacements, or comparisons.
Example: "Before purchasing a new device, make sure to back up all data from your existing phone."
Alternatives: "a current phone" or "an active phone."
The system cannot be retrofitted to an existing phone.
Among the other measures Mr. Kelly is expected to introduce will be a program to encourage New Yorkers to call an existing phone line to report quality-of-life problems.
AT&T has also shaved its capital spending, but for a different reason: It purchased an existing phone network, rather than spending the money to build a new one.
You can also port an existing phone number and get rid of your second phone.
Under line-sharing, a higher-frequency "DSL" signal rides alongside a regular low-frequency phone call on an existing phone line, thus "sharing" the same wire.
The fact remains that Nokia is essentially just re-skinning an existing phone, however, so it's not likely to upset the cart too much in terms of mobile industry composition.
Lookout's app has an existing phone-finding feature, called Locate, but this requires a user to initiate the location process on Lookout's site, and won't work if the device is switched off.
Standard service, which shares a consumer's existing phone line, will cost 7,000 yen ($65) a month, or a little more than twice what the dominant service costs and is expected to attract 5,000 users by March, the spokesman said.
It allows the digital audio receiver to pull MP3 songs and playlists, managed by either Music Match or Real Audio software, into the receiver through a home's existing phone jacks.
The organization has teamed up with AT&T and Ericsson to show a proof-of-concept called WebPhone, which demonstrates how its Firefox browser can use Mozilla's Social API, AT&T's API Platform and Ericsson's Web Communication Gateway to let Firefox users sync with a user's existing phone number and provide calling services without the need to install any plugins or special apps.
Instead, calls to an eVoice user's existing phone number that go unanswered are forwarded directly to voice mail.
