Review: AT&T Spark by Harman (Mobile Hotspot / Connected Car)

The Harman Spark is a "Connected Car" device from AT&T that plugs into a vehicle's OBD-II diagnostic port, automatically creating a Wi-Fi hotspot for up to 8 devices when the ignition is turned on.

The Spark enables telematics for emergency assistance, fleet management, theft, tracking and more. This devices plug into the onboard diagnostic ports (OBD-II) of 1996 and newer model year vehicles that don't have built-in systems like OnStar.

Rate plans for the device start at $5 per month for plans without Wi-Fi, to a $30/month unlimited data plan.  Plans including internet access are offered as both standalone or as an addition to eligible Unlimited and Mobile Share plans.

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For shared data plans, currently, AT&T offers Mobile Share Flex data plans for aftermarket OBD-II devices.  There is a $10 access fee per connected car device, in addition to the price of the plan.

Unlike AT&T's previous connected car device iteration, the Mobley, the Spark has specific terms of service and technical restrictions that limit use to a vehicle only - and AT&T reserves the right to terminate accounts for use outside of a vehicle.  The Spark's Wi-Fi also shuts down after 30 minutes of not being in motion.

Harman Spark Specifications

  • Model #: Harman HSA-15UA-AA
  • # of Connected Devices: 8 via Wi-Fi
  • Control Panel and Default Password:
  • USB Tethering Support: None
  • Supported Networks and Bands:
    LTE Bands: 2, 4, 5, 12, 17
  • LTE-Advanced Carrier Aggregation: No
  • MIMO Support: Unknown
  • LTE Performance Category: Unknown
    (Max Theoretical Speed: __Mbps Down / __Mbps Up)
  • Cellular Antenna Ports: None
  • Other Ports: OBD-II
  • Wi-Fi Technology / Frequencies: 802.11 b/g/n - 2.4GHz only
  • Claimed Battery Life: N/A - does not have a battery
  • Can Be Powered Without a  Battery: N/A
  • Dimensions: 2.95" x 2.06" x 1.13" / 3oz
  • SIM Card Type: 3FF/Micro
  • Retail Price:  $79.99

Review & Testing Status

We have purchased a Spark on our AT&T Unlimited Plus account as an additional line, and will be testing it out.

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Harman Spark Ratings
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