Fi Mini GPS Tracker — Research Review

Overview

The Fi Mini is Fi’s smallest GPS tracker, positioned for very small pets. Manufacturer specifications list the Mini’s weight at 0.56 oz and its external dimensions as 42 × 30 × 12.5 mm. Fi describes the housing as a lightweight polymer and lists the unit as waterproof. The company also states the Mini is designed for smaller dogs (including dogs under 10 lbs) and for cats. The device is listed on Amazon (ASIN B0FMGRT8YK).

Connectivity and battery

Fi combines GPS location with cellular reporting through AT&T’s LTE‑M network. Fi documents its partnership with AT&T and reports that the Mini relies on LTE‑M connectivity for cellular service. Fi states a battery life of up to three weeks when used standalone, and up to three months when the tracker is paired with a Fi Base at home. The manufacturer also notes that a USB‑C charging cable is included with the Mini.

Sizing, attachment, and intended use

Fi provides three attachment systems for the Mini that fit collars and harnesses ranging from 3/8 in to 1 in wide. The manufacturer explicitly positions the Mini for smaller pets, including dogs under 10 lbs and cats.

Subscription, coverage, and warranty

Fi and Amazon materials indicate that a Fi Membership subscription is required to use the Mini’s cellular features; Fi bundles LTE‑M connectivity with its subscription after any included trial. Fi documents the dependence on AT&T LTE‑M coverage for cellular connectivity. Fi also provides a manufacturer warranty for the product; the company advises verifying the warranty term at purchase.

What the specs mean in practical terms

The Mini’s listed weight (0.56 oz) and compact dimensions make it one of Fi’s smallest trackers; Fi frames the product for pets at the lower end of the size scale and for cats. The manufacturer calls out two battery profiles: a standard standalone runtime and a much longer runtime when the tracker is used with a Fi Base at home. Connectivity depends on LTE‑M cellular service provided via Fi’s partnership with AT&T, and Fi explicitly links the product’s tracking service to LTE‑M coverage and to an active Fi Membership subscription.

Pros & cons (evidence‑grounded)

Pros: Extremely light and compact (0.56 oz; 42 × 30 × 12.5 mm); waterproof construction and lightweight polymer housing; up to three weeks of standalone battery life and up to three months with a Fi Base; GPS plus AT&T LTE‑M connectivity; USB‑C charging cable included; attachment systems for 3/8 in–1 in collars/harnesses.

Cons: Relies on AT&T LTE‑M coverage for cellular tracking; requires an ongoing Fi Membership subscription (LTE‑M bundled with subscription after any trial); warranty is provided by Fi but the term is to be verified at purchase.

Bottom line

Fi presents the Mini as a very small, lightweight GPS tracker built for smaller dogs and for cats, with GPS location and LTE‑M cellular connectivity via Fi’s partnership with AT&T. The Mini’s two battery profiles (standalone and extended when used with a Fi Base), USB‑C charging, waterproof housing, and collar/harness attachment options are called out by the manufacturer. Owners should be aware that LTE‑M coverage and an active Fi Membership subscription are required for the cellular tracking features, and should verify warranty terms at purchase. The Mini is listed on Amazon (ASIN B0FMGRT8YK).