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| Price | $199.95 | $349.95 to $499.99 | $299.00 to $299.99 | $199.99 to $599.99 | $179.99 to $599.99 |
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| Release date | June 30, 2008 | June 19, 2009 | October 28, 2009 | October 11, 2009 | |
| The Bottom Line | Despite some niggling design flaws and the lack of 3G support, the HP iPaq 510 Voice Messenger offers outstanding voice-command features as well as the enhanced productivity tools of Windows Mobile 6. | The HP iPaq 910c offers mobile professionals a well-stocked, messaging-centric smartphone, but it faces stiff competition from the likes of HTC, Samsung, and Motorola. | The iPhone 3GS doesn't make the same grand leap that the iPhone 3G made from the first-generation model, but the latest Apple handset is still a compelling upgrade for some users. The iPhone 3GS is faster and we appreciate the new features and extended battery life, but call quality and 3G reception still need improvement. | Despite some design issues and a couple of missing features, the Motorola Droid is the most powerful and fastest Google Android device to date. It fully embraces the openness of the Android platform and offers Verizon customers a smartphone that certainly rivals the other touch-screen devices on the market. | While it could use a boost in the performance department, the HTC Hero is the most feature-packed Google Android device to date, bringing some notable improvements and a highly customizable interface. |
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| Features | |||||
| Cellular technology | GSM | WCDMA (UMTS) / GSM | WCDMA (UMTS) / GSM | CDMA2000 1X | CDMA2000 1X |
| Weight | 3.6 oz | 5.1 oz | 4.8 oz | 6 oz | Info unavailable |
| Service & support details type | Limited warranty Technical support | Limited warranty Technical support | Info unavailable | Info unavailable | Info unavailable |
| Talk time | Up to 390 min | Up to 240 min | Up to 600 min | 385 min | 250 min |
| Wireless Interface | Bluetooth IEEE 802.11b IEEE 802.11g | IEEE 802.11b IEEE 802.11g Bluetooth 2.0 EDR | IEEE 802.11b IEEE 802.11g Bluetooth 2.1 EDR | IEEE 802.11b IEEE 802.11g Bluetooth 2.1 EDR | IEEE 802.11b IEEE 802.11g Bluetooth 2.1 EDR |
| Service Provider | Info unavailable | Info unavailable | AT&T | Verizon Wireless | Sprint Nextel |
| Band / mode | GSM 850/900/1800/1900 (Quadband) | WCDMA (UMTS) / GSM 850/900/1800/1900 | WCDMA (UMTS) / GSM 850/900/1800/1900 | CDMA2000 1X 1900/800 | CDMA2000 1X 1900/800 |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
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