Our verdict
The Unihertz Jelly Star is the most usable tiny Android phone we found on sale new, and a reasonable second phone for calls, messages, music, maps and tap-to-pay on T-Mobile. We would not make it your only phone, because a long-term reviewer reports it has received no security update since April 2023, and Unihertz makes no update promise. Its appeal is a 3-inch screen, a Helio G99 chip, 8GB of RAM, 256GB of storage, NFC and a headphone jack for $209.99. Its costs are stale security patches, carrier footnotes, a hard-to-use keyboard, a small battery and strict return terms.
Research-based review · Not scored · Checked November 8, 2026. We have not used a Jelly Star. This assessment compares Unihertz’s product page, store data and policy page with three hands-on reviews, two of which used units that Unihertz supplied. It contains no FlawCheck battery, performance, camera, network or durability measurements.
This review covers the Unihertz Jelly Star with 8GB of RAM and 256GB of storage, sold on Unihertz’s store as the US region variant in black or blue. It does not cover the Jelly 2, Jelly 2E, Jelly Max or older Jelly models. [1]
Consider it on T-Mobile for calls, music, maps and payments, alongside a main phone that holds your sensitive accounts.
The small screen discourages scrolling. Check your carrier first, and turn the back LEDs down.
Avoid. Old security patches, no update promise and a hard keyboard make it a risky main device.
Three takeaways govern this review: the hardware is current enough, but the reported security patch is from April 2023; “compatible” with AT&T and Verizon comes with footnotes that matter; and a refund requires an unopened box.
Strengths and weaknesses
The strongest reason to consider the Jelly Star over the cheaper Jelly 2E is that it is a real smartphone in a tiny body. Reviewers found the Helio G99 smooth in everyday apps, and it adds NFC, 8GB of RAM and 256GB of storage. It keeps a 3.5mm headphone jack and an infrared blaster.
- 3-inch screen and 116g body
- Texting is the hardest part, and the screen is hard to read in sunlight.
- Android 13, Helio G99, 8GB/256GB
- A reviewer reports no security update since April 2023, and Unihertz makes no update promise.
- NFC, headphone jack, IR blaster
- No wireless charging and 10W charging, according to reviewers.
- 4G LTE with a US carrier list
- AT&T depends on a whitelist and Verizon will not activate a new SIM in it.
These are reasons to investigate or avoid a purchase. They are not measured failure rates. Most of the risk comes from the software support and the carrier terms, not from the basic hardware.
| Claim | What the sources show | What to check |
|---|---|---|
| Powered by Android 13 system | Unihertz states no update commitment. The Gadgeteer reported in June 2025 that its unit was still on the April 2023 security patch.Source | Keep banking, work and password apps on a phone that gets current patches. |
| Works with T-Mobile, Verizon and AT&T | AT&T is limited to whitelisted devices, and Verizon will not activate a new SIM in the phone. Returns over carrier issues are refused.Source | Plan on T-Mobile, and check the IMEI with your carrier before ordering. |
| Use it all day long on a single charge | SlashGear had 20% left at night after a day off the charger; Sypnotix said it does not last a full day. No standard battery test was published.Source | Expect to charge daily, and more often with heavy use. |
| Smooth, speedy payments with NFC | NFC is present, but none of the reviews we read completed a Google Pay purchase.Source | Do not rely on it as your only way to pay until you have tried it. |
| LED light pulses with your notifications | SlashGear found the default LED brightness blinding and annoying.Source | Turn the LEDs down or off in settings. |
Design and portability
The phone measures 95.1 × 49.6 × 18.7mm and weighs 116g according to SlashGear’s review, and Unihertz’s store data lists a weight of 116 for every variant. We have not weighed or measured a unit. At 18.7mm it is thicker than most full-size phones, so it is short and narrow rather than thin. [1][2]
Roughly credit-card sized, but 18.7mm thick.
- Height
- 95.1mm
- Width
- 49.6mm
- Depth
- 18.7mm
- Weight
- 116g
- Screen
- 3.0in
- Battery
- 2,000mAh
It fits a coin pocket. The trade-off is a keyboard that is hard to type on, a small battery and a thick, rounded body.
The Gadgeteer wrote that “The plastic does not feel cheap” and that nothing creaks when squeezed. Sypnotix found the opposite problem: the smooth, rounded body made it “Difficult to grip”. Unihertz does not list a water or dust rating for the Jelly Star, and we found none. [1][2]
The transparent back has notification LEDs. SlashGear found that at their default settings the lights are “blindingly bright and just downright annoying”, and listed them as a con. They can be adjusted in settings. [1]
Unihertz lists a 3.5mm audio jack, an infrared port, dual nano SIM cards and fingerprint unlock, plus FM radio and USB OTG. These are real extras for a phone this size. We have not tested the IR blaster with any device. [1]
Display and everyday usability
SlashGear and Notebookcheck list a 3-inch LCD at 854 × 480, and SlashGear gives a 60Hz refresh rate. SlashGear called it “crisp” indoors. That is enough for messages, music controls and directions. It is small for reading, video or photos. [1]
Brightness is a weak point. The Gadgeteer found the screen “difficult to see in direct sunlight and even under bright overcast skies”. Sypnotix said “the display doesn’t get that bright” and that viewing angles and colors were “barely acceptable”. [1]
The main usability problem is typing. The Gadgeteer wrote that “Texting on the Jelly Star was the biggest challenge for me simply because the keyboard is so tiny.” SlashGear noted that small close buttons on ads are hard to hit. Voice typing and short replies are the practical way to use it. [1]
Performance, memory and storage
Unihertz lists a MediaTek Helio G99 with 8GB of RAM and 256GB of storage. That is a mid-range chip and generous memory for a phone this small, and a clear step up from the Helio A22 in the Jelly 2E. [1]
SlashGear reported Geekbench 6 scores of 715 single-core and 1,948 multi-core and found no “stuttering or slowdowns”. The Gadgeteer saw “no performance lags”, and Sypnotix said a demanding game ran “surprisingly well”. These are reviewer results, not FlawCheck tests. Our guide on what makes a phone fast explains how to read a single benchmark result. None of the reviews reports heat under sustained load. [1]
Cameras
Unihertz lists a 48MP rear camera and an 8MP front camera. All three reviews say low light is the weak spot. SlashGear found the main camera “struggles in low light”, and Sypnotix called low-light shots “basically an unfocused, grainy mess”. Daylight photos fared better. We would not buy this phone for photography. [1]
Battery and charging
Unihertz lists a 2,000mAh battery and says you can use the phone “all day long on a single charge”. The reviews disagree. SlashGear took it off the charger at 6:30 a.m. and had 20% left at 10 p.m. Sypnotix said the battery “Doesn’t last a full day” and that light use could drain it within a work day. None of the three ran a standard battery test, and we have no FlawCheck measurement. Plan on charging daily. [1][2][3]
SlashGear reports 10W charging that “can take upwards of an hour and a half to fully charge”. The Gadgeteer measured about 70 minutes from 50% to 100%. There is no wireless charging. Unihertz’s product page does not state a charging speed. [1]
Connectivity, software and ownership
Security patches have not kept up
The phone runs Android 13, according to Unihertz. The Gadgeteer’s reviewer kept using the phone and wrote in a June 2025 update that it had “-never- received one security update” since mid-2023 and “still bears the update it came with, dated April 2023”. The reviewer called this “a firm deal breaker”. SlashGear warned in 2023 that further Android updates were not guaranteed. We found no Unihertz commitment for OS upgrades, security patches or a support end date, and we could not confirm the patch level on phones shipping today. [1][2][3]
That makes the Jelly Star a poor home for banking, work or password apps. Our guide to phones for long-term ownership explains why the support window matters more than the purchase price.
US carriers: read the footnotes
Unihertz lists T-Mobile, Verizon and AT&T, but its own footnotes limit two of them. AT&T is “only compatible with whitelisted Unihertz devices (Jelly 2, Titan 2, etc.)”, and the Jelly Star is not named in that example. For Verizon, Unihertz says the phone “is not certified by Verizon, you cannot activate your new SIM card with it”. Eleven smaller carriers on the list are marked “This MVNO may not work properly with Unihertz devices”. [1][2]
What Unihertz says about each US network.
- T-MobileListed without a footnoteListed
- AT&T"only compatible with whitelisted Unihertz devices (Jelly 2, Titan 2, etc.)"Whitelist
- Verizon"not certified by Verizon, you cannot activate your new SIM card with it"No new SIM
- 11 smaller carriers"This MVNO may not work properly with Unihertz devices"May not work
Unihertz does not accept returns over carrier compatibility. Check the IMEI with your carrier before ordering.
Unihertz also says: “We do not accept return requests related to carrier compatibility issues.” Even on T-Mobile, Sypnotix found its LTE connection “a bit spotty and weaker” than usual, though “reliable enough”. We could not read an official band list, and we did not check an IMEI or activate a unit. Check the IMEI with your carrier before you order. [1][2]
NFC is included
Unlike the Jelly 2E, the Jelly Star has NFC, which Unihertz advertises for payments and data transfer. None of the reviews we read completed a Google Pay purchase, and payment apps can be strict about old security patches, so we cannot confirm that tap-to-pay works today. [1]
Warranty and returns favor unopened boxes
Unihertz’s warranty, return and refund policy gives smartphones a “12-Month Warranty”. Accessories get one month. [1]
For a return without a defect, “The smartphone must be unused and in its original, unopened packaging”, and devices “that have been unboxed, activated or used are not eligible for a refund”. The buyer pays return shipping, and the refund excludes shipping fees. The policy does not state a number of days for these returns. In practice, you cannot try the keyboard or a SIM card and still get your money back. [1][2]
Alternatives and value
Our reference offer is the US region variant on Unihertz’s store at $209.99, with a crossed-out $229.99. Black and blue are available; red is out of stock in every region. This is a storefront observation from November 8, 2026, not a delivered total. [1][2]
| Item | What we observed on November 8, 2026 | Status |
|---|---|---|
| Unihertz store, US variant (black or blue) | $209.99, compare-at $229.99 | Listed as available |
| Earlier reviewer prices | $219.99 paid (2024), $199.99 listed (2025) | Historical, not today’s price |
| Shipping | Free on phone-only orders over $99 in the USA | Product page banner |
| Returns without a defect | Unopened box only; buyer pays shipping | Refund policy |
| Delivered total | Not checked | Unavailable |
We have no verified delivered total. Discount codes on Unihertz’s store change often and are not included here. A crossed-out price is not a saving we can verify.
The alternatives depend on why you want a small phone. The Unihertz Jelly 2E is lighter and was cheaper, but it was listed as sold out when we checked, and it is frozen at Android 12, has no NFC and uses a much slower chip. A basic calls-and-texts phone avoids the patch problem altogether. If this will be your only phone, a current mid-range Android with a stated update period is the safer choice, even though it is twice the size.
Three ways to carry less.
Final verdict
Consider the Jelly Star if you want a second phone the size of a credit card for calls, music, maps and payments, you use T-Mobile, and you accept that its security patches may be years old. Check the IMEI with your carrier and read the return terms before you order, because carrier problems and opened boxes are not refunded.
If you need a primary phone, current security patches, AT&T or Verizon, comfortable typing or a full day of heavy use, we would choose a different device. We are withholding a numerical score because we have not tested the phone or verified a full transaction.
Frequently asked questions
Does the Jelly Star get security updates? The Gadgeteer reported in June 2025 that its unit was still on the April 2023 patch, and Unihertz makes no update commitment. We could not confirm the patch level on phones shipping now.
Does the Jelly Star work on AT&T or Verizon? Unihertz says AT&T works only with whitelisted devices and does not name the Jelly Star, and that a new Verizon SIM cannot be activated in it. T-Mobile is the safer choice. We did not test any carrier.
Does it have NFC for Google Pay? It has NFC. We found no review that completed a Google Pay purchase, so we cannot confirm that payments work.
Is the Jelly Star better than the Jelly 2E? On hardware, yes: a much faster chip, twice the RAM, four times the storage and NFC. It costs more, and it has the same carrier and return terms. The Jelly 2E was listed as sold out on Unihertz’s store when we checked.
Can I return it if I don’t like the small screen? Only if the box is unopened. Opened or activated phones are not eligible for a refund, and you pay return shipping.
Sources and method
This is a Research-based review prepared from documents checked on November 8, 2026. The target is the Jelly Star with 8GB of RAM and 256GB of storage, US region variant. Leo Conrad Nguyen is the named editorial author. Pending evidence decisions are not represented as completed human approval.
Primary material includes Unihertz’s product page, its store variant data and its warranty, return and refund policy.
Hands-on observations come from SlashGear and The Gadgeteer, both of which used units Unihertz supplied, and Sypnotix, which reports buying its unit and carries an affiliate link. We use Notebookcheck’s spec page for the display and size. Where sources disagree, we name the conflict.
We have no test unit, IMEI result, battery run, charging log, benchmark, camera sample or checkout total. The hero image is Unihertz artwork with a background extended by FlawCheck, not a test photograph. No affiliate links or numerical product scores are used.
