Though the i670's feature set is relatively sparse, it still has all the Nextel business-friendly offerings you'd expect. The 600-contact phone book has room in each entry for seven phone numbers, an e-mail address, an IP address and a Direct Connect number. Contacts can be further organized into a variety of groups for regular or PTT calls, and you can pair them with one of 12 monophonic or 5 polyphonic ring tones. Other features include a vibrate mode, a calendar, voice dialing, call and voice memo recording, a memo pad, text and multimedia messaging, the aforementioned speakerphone, an airplane mode, and onboard GPS. You also get Nextel's Direct Connect walkie-talkie service (including Group Connect, which lets you chat with up to 20 others via PTT at once) and Direct Talk, which gives you out-of-network walkie-talkie chat with another Direct Talk handset at a range of up to 6 miles.
Personalization options were limited to a choice of wallpapers and two menu styles. You're stuck with what's on the handset already, but you can always download more options with the WAP 2.0 wireless Web browser. Alternatively, you get a fair choice of Java (J2ME) applications including two game demos (Space Invaders and Tetris); 1KTV, an on-demand pseudo-TV service; and the Trimble Outdoors and TeleNav subscription-based navigation service that takes advantage of the i6700's GPS support.
We tested the Motorola i670 (iDEN 850) in San Francisco using Nextel's service. Call quality was very good, offering loud and clear conversations. Listeners on the other end reported the same conditions, despite being able to tell we were using a cell phone. Speakerphone quality was good as well, though it's not worth much in noisy conditions outdoors. Since the speaker is on the rear of the phone, we'd advise placing the handset upside down on a table when making a speakerphone call.
The i670 has a rated talk time of 2.75 hours and a promised battery life of 5.4 days. In our tests, we fell short of the rated talk time by 15 minutes but got 6 days of standby time. According to FCC radiation tests, the i670 has a digital SAR rating of 1.05 watts per kilogram.
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