Fi Series 3+
REJECT Rejected — requires a vendor cloud or account for core function
Why it was rejected
Subscription-gated core function, sold bundle-only. Locating the dog when it is away from a known Wi-Fi network — the entire reason to buy a GPS collar — requires an active paid Fi membership plus a one-time activation fee; there is no free tier and no local-only mode. Fi does not sell the hardware standalone: major retailers list the collar only as a bundle with a prepaid plan (Costco '14-Month Membership', Amazon '[12 Month Membership Included]'), so there is no purchase path that yields working hardware without buying service.
The unplug test
Nothing to unplug — this device only matters when your dog leaves the house, and that is exactly when it needs a live cellular data connection to Fi's servers, not your home network. Inside Wi-Fi range it can still log steps and sleep and alert you to a geofence breach. The moment the dog is out of Wi-Fi range without an active membership, the collar cannot tell you where it is, which is the one job you bought it to do.
Why this tier: A GPS pet tracker whose purpose is finding a dog that is out of range, with tracking away from home Wi-Fi gated behind a paid membership sold in prepaid 6/12/24-month blocks plus a $20 activation fee. The bundle-only retail model is independently visible on Costco and Amazon listings, which name the included membership term in the product title. Sources disagree on how total the gating is — one reports the current-generation collar will not enable at all without an active membership, another describes it as losing out-of-range GPS specifically — so this record rejects on the narrower, better-supported claim: the paid plan is unavoidable for the function people buy the device for. The stronger claim is left as an open question rather than asserted.
Specifications
| Account required | for core |
|---|---|
| Works offline | partially |
| Lost when offline | live GPS location outside home Wi-Fi range without an active paid membership, Lost Dog Mode / live tracking, possibly all collar function on newer units without an active membership, per one source |
| Forced firmware updates | unknown |
| Radios | cellular, ble, wifi |
| FCC ID | no intentional-radiator grant found |
| Local control | none |
| Phones home | heavy |
| Self-hostable | none — no self-hosted replacement exists No documented local-only mode. Location data outside home Wi-Fi is inherently cellular and vendor-relayed; there is no self-hosted or LAN alternative for the GPS function. |
| Parts available | unknown |
| Availability | in stock |
| Price band | $99-339 per membership term (6/12/24-month prepay) plus a $20 activation fee; collar is bundled with the plan, not sold separately (seen 2026-09-02) |
| Vendor risk | not assessed |
Consider instead
- garmin-alpha-200i-t5
A GPS dog tracker whose tracking path carries no subscription and no cloud: the collar transmits position to the handheld over a Part 95J MURS radio link and the handheld draws it on its own screen, working in country with no cell coverage. Sold outright rather than bundled with a plan. It is a different and more expensive class of product aimed at sporting dogs, and the same handheld's inReach satellite messaging is separately subscription-gated - but the thing Fi charges a membership for, knowing where the dog is, needs nothing here.
Open questions
- Whether the newer Series 3+ truly refuses to function at all without any membership (as one source claims) versus only losing out-of-range GPS (as another source describes for the collar generally) is unresolved between the two sources and should be confirmed against Fi's own support documentation, which returned 403 to automated fetch.
- FCC grant not located under 'Fi Series 3' search; a grantee-level search (the company operates as Fi, formerly Fi Technology) was not completed within budget.
- Current US price/availability directly from fi.com was not confirmed; figures here come from a third-party cost breakdown.
Sources
Class A is primary (manual, FCC filing, teardown). Class B is corroborated community reporting. Class C is never sufficient alone.
- B https://lifewithkleekai.com/how-much-does-fi-series-3-dog-collar-cost/
States 'You will need a membership to enable Fi Series 3+ dog collars,' a change from the prior Series 2 which allowed some use without a subscription. Lists a $20 one-time activation fee and prepaid membership pricing of $99/6mo, $189/12mo, $339/24mo with no month-to-month option. — accessed 2026-09-02 - B https://staceyoniot.com/the-fi-collar-is-what-you-get-the-dog-who-has-everything/
Independent hands-on review confirming live location tracking outside home Wi-Fi range requires the paid annual subscription; without it the collar still logs steps, sleep, and geofence alerts inside Wi-Fi range but cannot perform live tracking, which the reviewer identifies as the product's core purpose. — accessed 2026-09-02 - B https://www.costco.com/p/-/fi-series-3-smart-dog-collar-gps-tracker-and-activity-health-monitor-14-month-membership/4000375586
Retail listing sells the Series 3+ only as 'Fi Series 3+ Smart Dog Collar - GPS Tracker and Activity & Health Monitor, 14-Month Membership'. Corroborates that the hardware is not sold standalone: the membership term is part of the SKU. Independent of the two cost-breakdown sources; a second such listing appears on Amazon with a '[12 Month Membership Included]' title. — accessed 2026-09-03
History
- 2026-09-02 — First published as REJECT.
- 2026-09-03 — Rejection narrowed to the claim the sources actually establish (paid plan unavoidable for out-of-range tracking; hardware sold bundle-only) after two cited sources were found to disagree on whether the collar functions at all without a membership. Retail listing added as independent corroboration of bundle-only sale.
Last verified 2026-09-02 — 4 days ago.