eufy 4G LTE Cam S330 Review

Who the eufy 4G LTE Cam S330 is for

This camera exists for one problem, and it solves it better than anything else we carry: a place worth watching that has no Wi-Fi and no outlet. A gate at the end of a long rural drive. An RV in a storage lot. A barn, a site hut, a second property, a boat on a trailer. In all of those the usual advice — buy a cheap camera and run a USB cable — is not advice, it is an electrician’s quote and a router you do not have.

eufy’s answer is to put all three missing pieces in the box: a cellular radio with a SIM, a 9,400mAh battery with a 4.5W solar panel, and a 32GB microSD card so there is somewhere for the footage to go on day one. Nothing in that chain depends on your house. That is the whole argument, and if it describes your problem the rest of this review is about the trade-offs rather than whether to buy.

If the spot you want to cover does have Wi-Fi, buy a different camera. A cellular radio is cost and complexity you have no use for, and the money is better spent on the eufyCam S330 (same 4K sensor, footage on a HomeBase in your house) or on the Reolink Argus PT Ultra, which is dual-band and cheaper. We own neither this camera nor any other and have tested none of them; here is what we do instead, and every figure below is read from eufy’s own product page on the date in the sources.

The monthly cost, which is the actual question

Search for this camera and the two things people ask after “review” are its monthly cost and its data plan cost. Here is the honest answer, in two parts, because they are two different bills.

eufy charges nothing to record. The statement on eufy’s own page is unambiguous: “There is no monthly fee to eufy for recording, local storage, or app features.” Its spec block says the same in shorthand — “Monthly Fees: No Monthly fee for local recording”. A eufy Plus membership exists and adds cloud backup history, and eufy does not make it a requirement for the camera to function. On the no-fee question, this camera passes the test this whole site is built around.

The carrier charges you for the data, and that is unavoidable. This is the cost buyers miss, and it is not eufy’s fault — eufy publishes an estimate and is clear that it is an estimate. The figure is around 700 MB per month, and eufy attaches its own usage pattern to it: ten live views of ten seconds each per day, plus 25 motion-triggered ten-second recordings a day. eufy says actual usage may differ.

Take that seriously rather than as a quoted bill. Two things inflate it fast. The first is you: every time you open the app to look at the camera, that is a 4K stream over cellular, and people check a new camera far more than ten times a day in the first week. The second is the scene. Mounted on a quiet storage bay, motion events are rare and 700MB is generous. Aim the same camera at a road, a parking area or a tree line that moves in the wind and the event count is not 25 a day, it is hundreds — which is why the activity zones eufy ships are not a nice-to-have on a cellular camera, they are the thing standing between you and an overage charge.

One more cellular detail that is easy to get wrong at checkout. eufy includes a 3-in-1 SIM it says works on AT&T, T-Mobile and Verizon in the US, and publishes the supported US 4G bands as B2/B4/B5/B12/B13/B14/B66/B71. If you would rather use your own nano SIM on a cheap data-only plan, eufy says that works, and that a 5G card will run at 4G speeds. Check your carrier’s cheapest data-only tariff against that band list first, and note eufy’s own warning that the included SIM is intended for the region where the camera was bought, so taking it abroad may stop it connecting.

What eufy started publishing, and why we are flagging it

When we first put this camera in our registry in October 2026, eufy published remarkably little hardware detail for it: no IP rating, no field of view as a number, no pan or tilt degrees, no solar panel wattage, and no maximum card capacity. We said so on the pages that recommend it, because an absent spec is itself information.

Re-reading the same page for this review, all five are now published. That is a genuine improvement by eufy rather than a correction of ours, and it changes two of our recommendations, so we are recording it rather than quietly editing. The camera is now described as “an IP55-rated outdoor camera for sites with no Wi-Fi and no power outlet”. The field of view is 138° diagonal. It pans 344° and tilts 70°. The included panel is 4.5W. And the storage line reads “32 GB microSD, expandable up to 128GB”, which answers both the is-a-card-included question and the ceiling.

The practical upshot: if a published weather rating was the reason you were steering away from this camera, that reason is gone. IP55 is dust protection plus resistance to low-pressure water jets from any direction — appropriate for an exposed pole or wall, and a real step below the IP67 eufy publishes for the mains-free eufyCam S330. It is not a camera to submerge or pressure-wash.

The hardware, read off eufy’s own spec block

Where it is genuinely good

It removes two dependencies at once. Most “off-grid” cameras solve power and then quietly assume a hotspot. This one solves both, and the auto-switching behavior is the detail that makes it usable at a property with patchy Wi-Fi rather than none: it will use your network when it is there and fall back to mobile data when it is not.

The pan-and-tilt head earns its keep on a cellular camera specifically. When each camera costs you a data line as well as hardware, one unit that covers 344° is worth much more than it is on a house where you would just add a second camera. Four presets means you can define the gate, the parking spot and the door and move between them.

The footage is yours, on a card, with no fee. The thing that makes a cellular camera look expensive is the data plan; the thing that would make it genuinely expensive is a cloud subscription on top. eufy does not charge one, and the card is in the box.

Where it compromises, plainly

The data plan is a real recurring cost and the one number eufy gives you is an estimate. We rank this camera first on pages where no network exists because there is no alternative, not because it is cheap to run. If you are comparing it against a Wi-Fi camera on sticker price, you are comparing the wrong numbers.

128GB is the storage ceiling, and the card is in the camera. On an exposed install the camera is the vulnerable object, and everything it has recorded is inside it. The HomeBase route that solves this on a house works over Wi-Fi, so it does not help a cellular install at a gate or a storage lot. Mount high, mount where removal is slow and visible, and accept that a determined thief takes the archive with the camera.

No detection distance is published anywhere. This is the figure we most want and the one eufy still does not give. For comparison, Reolink publishes PIR detection “Adjustable up to 10m (33 ft)” for the Argus PT Ultra, and eufy’s own FAQ for the eufyCam S330 gives 25-30 ft. Without a number for this model, mount it where the subject arrives rather than where you can see the whole approach — the reasoning is the same as on our driveway camera page.

Event recording only, 2.4GHz Wi-Fi only, and no 24/7 option. All three follow from the battery. If continuous recording is the requirement, this is not the camera and no battery camera is; that needs mains power, which is the one thing the site this camera is sold for does not have. And because the Wi-Fi fallback is 2.4GHz-only, it will not join a 5GHz-only network if you ever bring it indoors.

The license plate claim is narrower than it reads. eufy’s wording specifies color4K at 30 feet. Night is infrared and monochrome by default, color only inside the spotlight’s published 26-foot reach, and eufy does not say whether the plate claim survives that switch. There is also physics working against it: a retroreflective plate bounces infrared straight back and blows out to white, and a 138° lens spends its pixels on the whole scene.

The verdict

If the place you need to watch has no Wi-Fi and no outlet, the eufy 4G LTE Cam S330 is the right buy and there is not much competition for the slot. It arrives with everything the install needs — radio, SIM, battery, panel, card — eufy charges nothing to record, and now that eufy publishes IP55, a 138° field of view, 344° of pan and a 128GB storage ceiling, you can actually plan an install around documented numbers rather than marketing copy.

Buy it understanding that the recurring cost moved rather than disappeared: there is no camera subscription, and there is a data bill whose size depends on how disciplined you are with activity zones and how often you open the app. Set the zones on day one, resist checking it hourly, and the 700MB figure is reachable. Ignore both and it is not.

And if the spot has Wi-Fi after all, buy a cheaper camera. The wireless camera ranking is the right page for that, and the RV and camper picks are where this camera’s case is made against the two Wi-Fi alternatives we would otherwise recommend.