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printed December 18, 2017
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Review: ZTE Warp Sync for Boost Mobile

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Screen

ZTE gifted the Warp Sync with an excellent display. It measures 5 inches across the diagonal and offers 720p HD resolution. We might have expected ZTE to drop the resolution down to qHD at this price point, so it's a bonus that they went for 720p. I found the screen to be bright, colorful, and sharp. On-screen elements are clear and often pop visually. The phone has excellent viewing angles, and there's no brightness or color change when the phone is tilted side-to-side. You will have to crank the brightness to use the Warp Sync outdoors, but I had no problem taking pictures on a sunny afternoon.

Signal

Boost Mobile operates on Sprint's network around the U.S. The Warp Sync performed slightly under par with other devices I've tested on Sprint's network in and around New York City. It generally remained connected to the network, though it dropped off a few times under the worst signal conditions. The phone was slow to transition from 3G to LTE in areas I knew to have strong LTE coverage. Phone calls all connected on the first dial, but the Warp Sync did drop two calls when transiting between cell towers. Surfing speeds were acceptable when the Warp Sync connected to LTE, but slowed down dramatically over Sprint's 3G network.

Sound

I'd rate phone call quality as about average. It wasn't bad, but wasn't exceptional, either. The Warp Sync suffered from distortion from time to time, and — even at its maximum setting — was just loud enough to handle everyday environments. Moderately noisy spaces, such as a coffee shop, gave the Warp Sync a run for its money and forced me to step outside. Those who I spoke to through the Warp Sync said I sounded rather crummy. The speakerphone demonstrated poor call quality, but fairly good volume. I was able to hear the crackling distortion loud and clear. Ringtones and alerts produce just enough noise to get your attention when necessary, even if you're on the other side of your house. The vibrate alert is strong enough to make the phone dance across a table.

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Battery

A 2,300 mAh battery is packed into the Warp Sync and it delivers a full day of mixed use. The phone always managed to keep a charge from breakfast to bedtime despite heavy testing of features like the camera, email, Bluetooth and GPS, and media playback. Tasks such as emailing and reading through your Twitter timeline hardly tax the battery at all. Most users will need to charge the Warp Sync at night, but can rest easy knowing their phone will get them through the day.

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