Snapdragon X12 LTE

Qualcomm Snapdragon modems are a product of Qualcomm Technologies, Inc.

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Snapdragon X12 LTE Modem


The Qualcomm® Snapdragon™ X12 LTE Modem is a great fit for those who depend on today’s fastest connections. By supporting several next-generation features such as LTE Advanced Carrier Aggregation, LTE in unlicensed spectrum (LTE-U), and LTE + Wi-Fi Link Aggregation, the Snapdragon X12 LTE Modem represents the ultimate in LTE connectivity.

More data and more connections.

The Snapdragon X12 LTE modem cranks peak download speeds up to 600 Mbps and peak upload speeds up to 150 Mbps, thanks to support for LTE Advanced carrier aggregation (3x in the downlink, and 2x in the uplink) and higher order modulation (up to 256-QAM in the downlink, and 64-QAM in the uplink). It even supports downloading data on 4 antennas simultaneously with support for 4x4 MIMO. That means lightning fast connections, quicker network response times, and richer app content.

Goodbye congestion.

With the help of LTE-U small cells, the Snapdragon X12 LTE Modem can access LTE connections in both licensed spectrum and unlicensed spectrum — boosting your connection speeds in normally congested areas.

The best of both worlds.

The Snapdragon X12 LTE Modem can automatically switch between LTE and Wi-Fi, picking the link that has the strongest signal quality and highest end-to-end speeds. That means better voice and video calls. Plus, if your operator supports the feature, the Snapdragon X12 LTE modem can even bond your LTE and Wi-Fi links together to boost download speeds with LTE + Wi-Fi Link Aggregation (LWA).

Snapdragon X12 LTE Modem Specs

Cellular Modem


  • Snapdragon X12 LTE Modem
  • Snapdragon 821 processor
  • Snapdragon 820 processor
  • Snapdragon 660 Mobile Platform
  • Snapdragon 630 Mobile Platform

LTE Category

  • LTE Category 13 (uplink)
  • LTE Category 12 (downlink)

Downlink Features

  • 3x20 MHz carrier aggregation
  • Up to 256-QAM
  • Up to 4x4 MIMO on one carrier

Uplink Features

  • Qualcomm® Snapdragon™ Upload+
  • 2x20 MHz carrier aggregation
  • Up to 2x 75Mbps LTE streams
  • Up to 64-QAM
  • Uplink data compression

Peak Download Speed

  • 600 Mbps

Peak Upload Speed

  • 150 Mbps

Supported Cellular Technologies

  • LTE-U
  • LWA
  • LTE Broadcast
  • CDMA 1x
  • EV-DO

Multi SIM

  • LTE Dual SIM Dual Standby (DSDS)

Next-generation Calling Services

  • VoLTE with SRVCC to 3G and 2G
  • Voice over Wi-Fi (VoWiFi) with LTE call continuity
  • Native HD video calling
  • HD Voice over 3G and VoLTE
  • CSFB to 3G and 2G


Part Numbers

  • MDM9645
  • MDM9640
  • MDM9340
  • MDM9245
  • MDM9240
  1. Not supported in Snapdragon 660/630
  2. Not supported in Snapdragon 660/630

The Snapdragon 820 Processor

With a built-in Snapdragon X12 LTE Modem, the Qualcomm® Snapdragon™ 820 processor not only enables breakthrough LTE and Wi-Fi connectivity, it also integrates the ultimate in processing power, efficiency, graphics and camera capabilities into a next-generation, premium-tier mobile processor.