HTC TyTN II Review: Revisiting the Kaiser Windows Mobile Powerhouse

A year after the HTC TyTN introduced a real slide-out keyboard and early HSDPA speed to a Windows Mobile phone, HTC followed up with something more ambitious. The HTC TyTN II, codenamed Kaiser and sold in the US as the AT&T Tilt, kept the resistive touchscreen and slide-out keyboard of the original but added a spring-assisted tilting display, integrated GPS, a better camera, and Windows Mobile 6 — while also shipping into a graphics-driver controversy that dogged it for much of its life. This is a different, later device from the original TyTN covered elsewhere on this site, and its specs shouldn't be mixed with that earlier phone's.

What Was the HTC TyTN II?

The HTC TyTN II was a Windows Mobile 6 Professional Pocket PC phone built around a 2.8-inch resistive touchscreen, a slide-out QWERTY keyboard, and a hinge that let the display tilt upward once the keyboard was open. Released in September 2007 under the internal codename Kaiser, it also carried the model number P4550 on HTC-branded units. In the US it's better known by its AT&T name, the Tilt — chosen specifically because of that tilting hinge. It was aimed at the same mobile-professional buyer as its predecessor, with a noticeably more capable feature set.

HTC Kaiser, the AT&T Tilt, and Carrier Variants

HTC licensed the Kaiser hardware to multiple carriers and resellers, each applying its own branding. In the US, most buyers never encountered the "HTC TyTN II" name at all — they knew it as the AT&T Tilt. Documented variants didn't all carry identical hardware, though, which is worth knowing before assuming any TyTN II matches another spec-for-spec:

Software, bundled apps, radio bands, and GPS configuration plausibly varied by carrier too, though this piece isn't asserting specifics beyond what's documented above.

Windows Mobile 6 Professional

The TyTN II shipped with Windows Mobile 6 Professional, a generation ahead of the original TyTN's Windows Mobile 5.0. WM6 refined the interface, improved Pocket Outlook and Office Mobile, and updated the underlying push-email and security stack — incremental rather than revolutionary, but real for a device built around business email and documents.

Touchscreen and Slide-Out Keyboard

Like its predecessor, the TyTN II used a 2.8-inch resistive touchscreen at 240x320 (QVGA) resolution, displaying up to 65,536 colors and designed for stylus input rather than bare-finger use — capacitive multitouch was still a couple of years from becoming standard on Windows Mobile hardware. The keyboard beneath it slid out sideways much as on the original TyTN, and contemporary hands-on coverage, including Mobility Today's own account below, singled it out as a genuine strength. What changed from the original TyTN was what happened next: rather than simply rotating into landscape, the screen could then tilt upward on its own hinge, covered next.

The Tilting Display: HTC's Central Innovation

The TyTN II's defining hardware feature, and the reason AT&T named its US version the Tilt, was a spring-assisted hinge built into the sliding mechanism. Opening the keyboard slid it out sideways as on the original TyTN, but the TyTN II added a second stage: the display panel could then tilt upward on its own hinge. Sources describe the maximum angle differently, with figures from roughly 100 to 120 degrees appearing across contemporary write-ups, but the practical effect was consistent — set on a flat surface, the screen angled up toward the user rather than lying flat, resembling a miniature laptop.

That tilt had real, documented uses: easier reading on a desk while typing email, comfortable video viewing without holding the phone up, and better positioning for glancing at GPS directions. Mobility Today's reviewer described watching Slingbox video at a 40-degree angle over lunch, and separately praised the tilted screen for desk-based email reading.

Processor, Memory, and Everyday Performance

The TyTN II ran a Qualcomm MSM7200 processor clocked at roughly 400MHz, with 128MB of RAM and 256MB of ROM — both a step up from the original TyTN's commonly cited 64MB RAM/128MB ROM. That extra headroom showed in real use: Mobility Today's reviewer praised the TyTN II for running Skype and Slingbox Mobile smoothly, and noted an absence of the soft resets that had plagued his prior Windows Mobile 6 Treo 750. The same MSM7200 platform, though, is central to the graphics-driver controversy covered further down — raw CPU performance and graphics performance turned out to be very different stories on this device.

Integrated GPS: A Major Upgrade Over the Original TyTN

The single biggest functional difference from the original TyTN was built-in GPS: the original's standard versions had none, while the TyTN II added an aGPS radio as core hardware. Mobility Today's hands-on references TomTom 6 Navigator for Pocket PC, purchased separately rather than preinstalled, and both Google Maps Mobile and Microsoft's Live Search for Mobile are documented working with the embedded GPS. This piece isn't asserting every GPS app ever associated with the TyTN II — TeleNav or CoPilot, for instance — shipped as an officially bundled option, since that's not clearly documented across variants.

Per that one documented account, performance was strong: an average satellite lock time around 6.5 seconds, and guidance called "dead on and exact" after a day of use, favorably compared to a dedicated TomTom 910 unit the reviewer also owned — a dated, sourced impression, not an independent benchmark.

HSDPA, HSUPA, Wi-Fi, and Bluetooth

The TyTN II supported tri-band UMTS (850/1900/2100MHz) with HSDPA and HSUPA, plus quad-band GSM/GPRS/EDGE as a fallback — an upgrade from the original TyTN's HSDPA-without-HSUPA radio, adding faster uplink alongside the already-fast downlink. It also included 802.11b/g Wi-Fi and Bluetooth 2.0 with Enhanced Data Rate. Mobility Today's surviving review didn't document a specific HSDPA speed test, so this piece isn't inventing one; what's confirmed independently is the underlying HSDPA/HSUPA capability itself.

Camera, Battery, and Storage Expansion

Camera-equipped variants carried a 3.1-megapixel autofocus rear camera capable of video recording, up from the roughly 2-megapixel camera commonly cited for the original TyTN. A front-facing video-call camera was documented on some non-US variants (KAIS120/KAIS130) but not on the US AT&T Tilt (KAIS100), and one US variant (KAIS110) shipped with no camera at all — don't assume a front camera on every unit.

Battery capacity is documented at 1,300–1,350mAh, removable. Mobility Today's reviewer identified his unit's cell as a Samsung KAS160, physically a different size that won't fit the original TyTN despite the similar naming, and called 1,350mAh "totally unacceptable" for a phone running Wi-Fi, HSDPA, GPS, and Bluetooth together — a specific, dated complaint, not a broad consensus. Storage expansion was via microSD, with later documentation citing microSDHC compatibility up to 32GB, though whether every unit's original firmware recognized cards that large likely varied.

Exchange, Outlook, and HTC Home

Like its predecessor, the TyTN II leaned on Pocket Outlook, Office Mobile, and Exchange ActiveSync for mail, calendar, and contacts — a continuation of the same productivity pitch rather than a reinvention. HTC also included HTC Home, a Today-screen plugin documented on TyTN II hardware under Windows Mobile 6, offering a clock, weather pulled from a remote server, and quick toggles like screen brightness and battery percentage — a modest interface layer, distinct from the touch-optimized TouchFLO experience HTC introduced separately on its HTC Touch line.

TyTN II vs. the Original TyTN

Set side by side, the generational jump is clear on paper, even though both share a broadly similar silhouette and screen size:

The Graphics Driver Controversy

Soon after launch, TyTN II owners and reviewers reported graphics and video performance well below what the MSM7200 platform's silicon should have delivered. Investigation centered on the XDA-Developers forums found DirectDraw and Direct3D calls running entirely in software rendering mode rather than using available hardware acceleration — producing choppy video playback and very low 3D frame rates, and pointing to missing or incomplete graphics drivers as the cause, not an inherently weak chipset.

HTC didn't ship an official fix, and XDA-Developers users organized a cash bounty for a working driver, with contemporary reporting putting the pooled total around $7,800 by early March 2008. Community-built drivers eventually enabled hardware acceleration under some conditions, though not universally. Worth being precise here: there's solid documentation of missing drivers and HTC's unhelpful public response, but no verified evidence HTC deliberately disabled functioning GPU hardware on purpose, and this piece isn't asserting that as fact.

Revisiting Mobility Today's Original Review

Mobility Today's original HTC TyTN II coverage, published Wednesday, September 12, 2007 by David Ciccone, survives in Wayback Machine snapshots. It's framed as a first-week hands-on account with running Likes and Dislikes lists, not a scored, benchmarked review — there's no surviving verdict score or formal build-quality section in the archived text.

Positives included no soft resets in daily use (a contrast drawn against a prior Windows Mobile 6 Treo 750), smooth Skype and Slingbox Mobile performance, a clear 3G call with only slight delay, a ~6.5-second GPS lock time with accurate TomTom guidance, praise for the keyboard as "the most comfortable . . I have ever used," enthusiasm for the tilting screen, USB charging, and an included screen protector. Complaints were just as specific: the 1,350mAh battery called inadequate for the radios it powered and physically incompatible with the original TyTN despite similar naming, a "weird" Bluetooth stack with lower call volume than a Motorola Q9m or Treo 750, frustration with HTC America's stated unwillingness to support the device, a missing Microsoft Voice Command, and bundled TomTom maps requiring a full US/Canada DVD purchase rather than smaller regional packs.

Because it was an early hands-on rather than a lab review, there's no surviving evidence of formal HSDPA benchmarks, a camera sample gallery, or a measured battery-life figure, and this article isn't claiming that depth existed where the archive doesn't support it.

TyTN II vs. Its 2007 Rivals

The AT&T 8525 was, in effect, the US branding of the original TyTN the Tilt succeeded — more a predecessor than a same-generation rival. Samsung's SCH-i760, on Verizon, paired a QWERTY slider with a numeric front keypad and EV-DO instead of HSDPA, with period forum comparisons describing its keyboard slide as tighter than the Tilt's. Verizon's XV6800, also HTC-built, ran WM6 Professional with its own QWERTY slider and reportedly better battery life. BlackBerry leaned entirely on push email over a full touchscreen; Palm's Treo stayed more compact and one-handed; and the original iPhone, launched months earlier with no physical keyboard, no 3G, no GPS, and no App Store, was a very different bet altogether. None of this is a declared winner — different answers to what a 2007 smartphone should prioritize.

Official WM6.1 and Later Enthusiast Developments

HTC released an official Windows Mobile 6.1 ROM update for the AT&T Tilt, with contemporary coverage dating its rollout to around August 26, 2008. That's documented specifically for the US AT&T variant; whether every international TyTN II variant got an equivalent official update on the same timeline isn't something this piece can confirm carrier-by-carrier.

Worth separating from the original 2007 spec sheet: years later, enthusiast communities built unofficial Windows Mobile 6.5 ROMs and even experimental Android ports for Kaiser hardware, extending the community driver work that grew out of the graphics controversy. HTC also later shipped genuinely newer devices — the HTC Touch Pro and the AT&T Tilt 2 (a rebadged Touch Pro2) — that shouldn't be confused with the TyTN II covered here.

Using and Collecting a TyTN II Today

A surviving TyTN II is realistically a collector's piece rather than a daily driver in 2026: many carriers have shut down the 2G/3G networks it relies on, Windows Mobile 6 hasn't had security updates in over a decade, and its browser can't meaningfully render the modern web. For a collection, check that the slide-and-tilt hinge moves smoothly without excess play, that every keyboard key registers, that the touchscreen responds accurately, general battery condition, whether the microSD slot still reads cards, and the condition of the Mini USB port and any original charger or cradle. Never charge or use a lithium battery this old if it shows swelling, bulging, or damage — that's a genuine fire risk, and it should be disposed of properly instead.

FAQ

What was the HTC TyTN II?

A Windows Mobile 6 Professional Pocket PC phone released by HTC in September 2007, codenamed Kaiser, adding a tilting display, integrated GPS, and a better camera over the earlier HTC TyTN.

Was the HTC TyTN II the same as the AT&T Tilt?

Largely yes — the Tilt was the US carrier branding for TyTN II (Kaiser) hardware — but the US variant lacked the front-facing video-call camera some international TyTN II variants had.

What was the HTC Kaiser?

Kaiser was HTC's internal codename for the hardware sold publicly as the HTC TyTN II, AT&T Tilt, T-Mobile MDA Vario III, and other carrier names.

When was the HTC TyTN II released?

September 2007; Mobility Today's original hands-on was published September 12, 2007.

Did the HTC TyTN II have GPS?

Yes, an integrated aGPS receiver — a major upgrade over the original TyTN, whose standard versions had no built-in GPS.

Did the HTC TyTN II have Wi-Fi?

Yes, 802.11b/g, alongside Bluetooth 2.0 with Enhanced Data Rate.

Did the HTC TyTN II support HSDPA?

Yes, tri-band UMTS with HSDPA and HSUPA, plus quad-band GSM/EDGE as a fallback.

What processor did the HTC TyTN II use?

A Qualcomm MSM7200 at roughly 400MHz, with 128MB RAM and 256MB ROM.

Why did the HTC TyTN II's display tilt?

A spring-assisted hinge let the screen angle upward independently of the keyboard, easing desk use, video watching, and glancing at GPS directions — the feature AT&T named the Tilt after.

What was the HTC TyTN II graphics driver controversy?

Users and XDA-Developers investigators found its 2D/3D graphics and video ran in software rendering mode rather than using available hardware acceleration, due to missing or incomplete drivers; the community pooled a cash bounty and eventually built drivers enabling partial acceleration. There's no verified evidence HTC intentionally disabled working GPU hardware.

How different was the HTC TyTN II from the original TyTN?

Substantially: Windows Mobile 6 instead of 5.0, integrated GPS the original lacked, a tilting display instead of a simple slide, more RAM/ROM, a faster 3.1MP autofocus camera, and added HSUPA — though both share a similar 2.8-inch resistive touchscreen and slider form factor.

Could the HTC TyTN II run Windows Mobile 6.1?

HTC released an official WM6.1 ROM update for the AT&T Tilt around August 2008; whether every international variant got an equivalent update on the same schedule isn't confirmed here.

Is the HTC TyTN II collectible today?

It holds genuine appeal for Windows Mobile and vintage-smartphone collectors, though it isn't practical for daily use given shut-down 2G/3G networks, an unsupported OS, and an aging, non-standard battery.

The HTC TyTN II never fully escaped the shadow of its own graphics-driver problems, but it's remembered for good reason: a tilting display that solved a genuine usability problem, integrated GPS its predecessor lacked, and a keyboard contemporary users, including Mobility Today's own reviewer, consistently praised. Sold as the AT&T Tilt, the HTC TyTN II, and half a dozen other regional names, it marks a real step forward in the short window before touchscreen-first phones redefined what a smartphone looked like.