Asus Zenfone 12 Ultra

GSMTechTok analysis

Who it's for

The Zenfone 12 Ultra is for a buyer who wants genuine flagship performance and class-leading battery life without paying Samsung, Apple, or Google prices, and who's comfortable with a phone Android Authority's own review title bluntly frames as "a lesson in AI overkill and short-term thinking." It suits buyers who specifically prioritize battery, charging speed, and a physical headphone jack over having the newest camera hardware or the longest software-update runway — Android Authority's own recommendation is direct that this exact combination is where the phone genuinely delivers. It's a strong fit for existing owners of a much older Zenfone looking to upgrade, since that same review found the unchanged bits of hardware would still feel like a real step up coming from a 2021-era device. It's a weaker fit for anyone who wants the best camera money can buy or a phone that will keep receiving fresh updates for years, since Android Authority's review is explicit that those buyers should give this one a miss — and Tom's Guide's own review title, "Good, but definitely not Ultra," captures the same broader hesitation.

Standout features

Battery life is the genuine, most consistently verified strength across every review sourced here — SuperFashion's testing found it consistently ending intensive full days with around 30% remaining, and NewGearHub's testing confirms it comfortably lasts a full day of heavy use and stretches into a second day under lighter use. Tom's Guide's own pros list calls the battery life "astounding" outright. Charging backs that up with real, measured numbers too — ASUS's own testing found 65W wired charging filling the phone from empty to 70% in just 30 minutes, and PhoneCompass's testing cites an independent reviewer's own measurement of 42% in 15 minutes using a compatible ROG Phone charger. The 3.5mm headphone jack is a real, genuine rarity at this tier — Tom's Guide and NewGearHub both independently flag its return as a meaningful quality-of-life win for anyone with existing wired headphones. The gimbal-stabilized main camera remains a real, distinctive Asus signature feature too, and NewGearHub's testing found it producing consistent, high-quality results, particularly for handheld video where the mechanical stabilization genuinely outperforms software-only alternatives.

Trade-offs

The most consequential, honestly stated limitation is Asus's own decision, not a hardware flaw: the company confirmed in January 2026 that this was its last non-gaming flagship, meaning buyers are purchasing into a discontinued product line with no successor coming, a real and disclosed factor for anyone weighing long-term software support. Camera quality beyond the main sensor's stabilization is a real, repeated soft spot — GSMArena's own review found overall camera quality hasn't meaningfully improved over the previous Zenfone 11 Ultra generation, calling it "okay, but nothing more," and Tom's Guide's cons list states plainly that overall photography is weaker than competitors at the same price. Android Authority's own testing found the underlying hardware largely unchanged from the previous year's model across battery, display, and camera, meaning existing Zenfone 11 Ultra owners specifically have little reason to upgrade, and that same review found the phone priced €100 higher than its predecessor for essentially the same package — with a discounted last-generation Galaxy S24 Ultra a genuinely strong alternative at similar money. Compass Score's aggregated review synthesis adds a real, specific technical caveat too: the Snapdragon 8 Elite chip throttles quite aggressively under prolonged load, and the newer chip has taken a real, if modest, toll on battery life compared to its predecessor. And availability remains a genuine, disclosed limitation — Tom's Guide's own cons list flags uncertain US and UK availability directly, with this device never officially sold in the US at all.