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Boost MAX+ by ZTE Cell Phone ZTE9521ABB-ZTE9521ABB
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Boost® MAX™+ by ZTE

This smartphone gives you maximum screen size for a superior experience. The Boost MAX+ boasts a 5.7-inch HD IPS Display with Corning® Gorilla® Glass, Dolby Digital® Plus sound, 4G LTE and Android™ 5.1. Take your mobile phone experience to the MAX.

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Get a $50 account credit when you switch to Boost Mobile.
$199.99 Retail Price
$40.00 Promotional Discount
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Promotional pricing available only for select phones directly from Limited time only, while supplies last. Android™ is a trademark of Google, Inc.

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Boost® MAX™+ by ZTE Features

Android™ 5.1 (Lollipop)

Fast, customizable, smooth. Enjoy the speed and simplicity of the powerful Android operating system.

Dual Mode 3G/4G LTE

Switch seamlessly between Sprint's reliable 3G nationwide network, which reaches more than 276 million people, and Sprint's blazing-fast 4G LTE network, reaching 340 million people and counting. Check coverage.

5.7-inch HD IPS Display with Corning® Gorilla® Glass

Everything's better on the big screen - and this durable, HD screen delivers. Experience the Web, apps and pictures like never before.

8 MP rear-facing camera with 1 MP front-facing camera

Capture vivid detail in almost any situation with sharp photos. The front-facing camera features 720p HD capabilities.

Available with Dolby Digital® Plus

Expect a more realistic, immersive experience. Movies and videos come to life with a powerful, virtual surround sound experience.

HD Voice+

Experience crystal-clear call quality with reduced background noise while calling another HD Voice-enabled phone on the Sprint network.

Mobile Hotspot Capable

Turn your phone into a Wi-Fi® hotspot for as low as $5/mo. Learn more.

Environmental Certification

Certified by the independent UL Environment, this phone contains environmentally-preferable materials with a minimal environmental impact. More info.
Show Full Features
  • 3-way calling
  • 3.5mm headset jack
  • 8MP camera
  • Accelerometer
  • Access to Boost Zone
  • Access to Gmail® and Google Talk™
  • Access to Google Play™
  • Audio Recorder
  • Calendar
  • Call waiting
  • Caller ID
  • Multi language settings
  • Full HD (1080p) video
  • Music player
  • Nationwide Sprint® 3G Network and Nationwide Sprint® 4G LTE Network
  • One-click access to Facebook®, Twitter® and more
  • Picture and video sharing
  • Portrait to Landscape auto-rotate
  • Speakerphone
  • Stereo Bluetooth®
  • TTY mode
  • Vibrate mode
  • Virtual QWERTY keyboard
  • Voicemail
  • Wi-Fi® enabled

Boost® MAX™+ by ZTE Specs

Size & Weight

  • Height 6.5"
  • Weight 6.87 oz
  • Width 3.25"
  • Screen Size 5.7" Touchscreen
  • Depth 0.4"


  • Talking Time16 hours
  • Battery Type 3,400 Li-Ion Battery
  • Removable No

Portion of memory occupied by existing content. Learn More

  • 2GB RAM / 16GB ROM


  • 1.2GHz Quad-Core Processor

Operating System

What's in the box

  • • Boost MAX+ handset
  • • USB Cable
  • • Printed Materials
  • • Charger Head
    Whats included with the Boost<sup class="rm">&#174;</sup> MAX&#8482;+ by ZTE

    User Guides & Device Support

    Want to know everything there is to know about this phone? Learn everything, from setting up your email to managing all of your games and applications.

    Device Support >

    Monthly Phone Plans

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    • 14-Day Return Policy
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    ULE Environment Score:

    Boost Mobile devices are assessed and rated on their sustainability by UL Environment. The score is based on UL 110 - the sustainability standard for mobile phones. We are the only wireless carrier to take all its devices through the independent UL Environment certification process. To be certified, phones must meet a set of prerequisites and then earn points based on additional sustainability criteria. The table below reflects the additional criteria scoring above the prerequisites.

    More info about ULE certification.

    • Materials
    • Energy & Performance
    • Health & Environment
    • End-of-Life Management/Life Extension
    • Packaging
    • Manufacturing & Operations

    A portion of phone memory storage is dedicated to the operating system and required services.  As a result this portion of memory is not usable by applications, pictures, videos or other personal data.

    Offer valid from 10/20/15 1/3/16 only.
    Limited to new monthly accounts switching from non-Sprint related carriers on Savings applied with new device purchase, while supplies last. Devices purchased from must be activated by 1/24/2016 to receive account credit. Cannot be exchanged, redeemed for cash, merchandise or services. Excludes sales tax. Services subject to additional terms and other restrictions. See for details. 2015 Boost Worldwide, Inc. All rights reserved.

    Coverage not available everywhere. Sprint 4G LTE coverage reaches over 230 markets and growing. Prohibited usage rules, additional terms, conditions, and other restrictions apply. See in-store materials or for full terms and details. ©2014 Boost Worldwide, Inc. All rights reserved. Boost, Boost Mobile and the logo are trademarks of Boost. Corning® and Gorilla® Glass are registered trademarks of Corning, Inc. Dolby is a registered trademark of Dolby Laboratories.

    HD Voice capability requires a call between two Sprint HD Voice-enabled devices in an upgraded area within the Sprint network.