Does the Series 9 work with Android phones?

No. The Apple Watch Series 9 pairs only with an iPhone, and setup requires one.

Do I need a carrier plan for cellular?

Yes. Cellular calling and data need an active plan from a supported carrier, usually added to your phone's plan.

Apple rates it at up to 18 hours of normal use, or 36 hours in low power mode. Most owners charge it nightly.

The Series 9 adds the S9 chip, a brighter 2,000-nit display, double tap and on-device Siri. The case design and battery life are largely unchanged.

The 45 mm case suits most adult wrists but is noticeably larger than the 41 mm version. Try it on if you prefer a smaller watch.

The watch, a matching band and a USB-C magnetic charging cable. A power adapter is not included.

At Back Market Pro - US (Prod), for $308.00, as of our latest check.

$308.00at Back Market Pro - US (Prod)Checked Nov 8

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