HTC P4550 Kaiser vs HTC Touch HD
| Type | Slide | Touch |
| Dimensions | 112.00 x 59.00 x 19.00 mm | 115.00 x 62.80 x 12.00 mm |
| Weight | 160.00 g | 146.40 g |
| Display size | 2.80" | 3.80" |
| Display | Color / TFT 64k colors 240 x 320 px (2.80") 143 ppi | Color / TFT 64k colors 480 x 800 px (3.80") 246 ppi |
| Display protection |   | |
| Additional display | | |
| Protection of the secondary display | | |
| Talk time (max.) | 2G: 300 min. (5.0 h) | 2G: 310 min. (5.2 h) 3G: 390 min. (6.5 h) |
| Video talk time (max.) |  | 120 min. (2.0 h) |
| Stand-by (max.) | | 2G: 390 h. (16.3 days) 3G: 450 h. (18.8 days) |
| Standard battery | Li-Ion 1350 mAhBuy powerbank
| Li-Po 1350 mAhBuy powerbank
|
| Quick battery charging | | |
| Wireless battery charging | | |
| Internal memory | 256 MB | 512 MB |
| RAM memory | 128 MB | 288 MB |
| Memory cards |  microSD, microSDHC up to 32 GBBuy memory card | microSD, microSDHC |
| Operating system | MS Windows Mobile 6.0 Pro | MS Windows Mobile 6.1 Pro |
| Processor | Qualcomm MSM7200 | Qualcomm MSM7201A |
| Processor clock | 400 MHz | 528 MHz |
| Touchscreen | | |
| SAR (10g) | 0,39 W/kg | |
| DualSIM | | |
| Announced | | 4Q 2008 |
| Other names | - | T8282; Blackstone |
| GSM frequencies | 850 900 1800 1900 | 850 900 1800 1900 |
| UMTS | 1900 2100 | 900 2100 |
| LTE standard | | |
| CDMA | | |
| Standard TD-SCDMA | | |
| UMA | | |
CAMERAS - BACK
| First camera | | |
| Photo matrix | 3 Mpx | 5 Mpx |
| Resolution | 2048x1536 px | 2592x1944 px |
| Optical zoom | | |
| Digital zoom | 8x | |
| Flash | | |
| Dual-colour LED flash | | |
| Video resolution | 352x288 px | |
| Video formats | 3GP, MPEG4 | |
| Additional | - | - |
CAMERAS - FRONT
| First camera | | |
| Photo matrix | 0.3 Mpx | 0.3 Mpx |
| Resolution | 640x480 px | 640x480 px |
| Optical zoom | | |
| Flash | | |
| Dual-colour LED flash | | |
| Video formats | 3GP, MPEG4 | |
| Additional | - | - |
SENSORS
| Accelerometer | | |
| Proximity | | |
| Light | | |
| Magnetometer | | |
| Gyroscope | | |
| Barometer | | |
| Altimeter | | |
| Gravity | | |
| Hall-effect | | |
| Iris scanner | | |
| Fingerprint scanner | | |
| Thermometer | | |
| Hygrometer | | |
Data transfer
| xHTML | | |
| WAP | v2.0 | v2.0 |
| HSCSD | | |
| HSDPA | | 7.20 Mbit/s |
| HSUPA | | 2.00 Mbit/s |
| HSPA | | |
| HSPA+ | | |
| LTE DL | | |
| LTE UP | | |
| WIMAX+ | | |
| GPRS | class 10 | class 10 |
| EDGE | class 10 | class 10 |
| Bluetooth | v2.0 | v2.0 EDR |
| A2DP Profile | | |
| HDMI | | |
| WiFi | v802.11 b/g | v802.11 b/g |
| WiFi frequencies | 2,4 GHz | 2,4 GHz |
| WiFi Direct | | |
| WiFi Display | | |
| DLNA | | |
| Miracast | | |
| WiFi hotspot | | |
| IrDA | | |
| USB | v2.0 | v2.0 |
| GPS | | |
| A-GPS | | |
| Beidou | | |
| NFC | | |
COMMUNICATION AND MESSAGING
| Call waiting | | |
| Conferency | | |
| Call forwarding | | |
| Push To Talk | | |
| Instant Messenger | | |
| SMS | | |
| EMS | | |
| MMS | | |
| Dictionary | XT9 | XT9 |
| Swype | | |
| e-mail client | POP3, SMTP | POP3, IMAP4, SMTP |
| Hardware QWERTY keyboard | | |
| RSS Reader | | |
Multimedia
| Radio | | |
| MP3 | | |
| Stereo speakers | | |
| Audio Jack | 3.5 mm | 3.5 mm |
| HD Voice | | |
| Sound formats | AAC, AAC+, WAV, WMA, eAAC+ | AAC, AAC+, WAV, WMA, eAAC+ |
| Polyphony | 64 voices | 40 voices |
| Ring composer | | |
| Games | | |
| Java | MIDP 2.0 | MIDP 2.0 |
| Videophone | | |
| DVB-H television | | |
| TV-Out | | |
PIM AND ADDITIONAL FUNCTIONS
| Watch | | |
| Stopwatch | | |
| Alarm | | |
| Calculator | | |
| Currency converter | | |
| Organizer | | |
| Calendar | | |
| Flight mode | | |
| SyncML | | |
| Data and fax | | |
| Screensaver | | |
| Themes | | |
| Interchangeable covers | | |
| Voice dial | | |
| Speakerphone | | |
| Recorder | | |
| Vibrations | | |