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| Product | T-Mobile Sidekick LX (orchid) | T-Mobile Sidekick LX (midnight blue) | T-Mobile Sidekick 4G (matte black) | T-Mobile Sidekick 3 | T-Mobile Sidekick Slide |
| Price | Pricing is currently unavailable. | Pricing is currently unavailable. | MSRP: $99.99 | $155.00 | Pricing is currently unavailable. |
| CNET editors' rating | 3.5 stars | 3.5 stars | 4 stars | 3 stars | 3 stars |
| Average user rating | 3.5 stars | 3.5 stars | 2.5 stars | 3 stars | 3 stars |
| Release date | May 13, 2009 | October 17, 2007 | April 20, 2011 | Info unavailable | November 7, 2007 |
| Bottom line | With the design improvements and addition of features such as 3G and GPS, the T-Mobile Sidekick LX 2009 graduates from a simple messaging handheld to a real connected, all-in-one communication device for the younger crowd. | The T-Mobile Sidekick LX will continue to attract a legion of young fans with its fresh design and excellent messaging capabilities. We like the improved display, and the software update brings some much-needed additions to the features department. | The T-Mobile Sidekick 4G continues the Sidekick's legacy as an excellent messaging device and also serves as a great entry-level smartphone. | The T-Mobile Sidekick 3 brings some notable additions, such as Bluetooth and an MP3 player, and continues to be a solid messaging device for the younger crowd; we just wish it had a better screen. | With its slide-up screen, the T-Mobile Sidekick Slide offers a nice design alternative to the other Sidekick models. It's fine for first-time users but diehard Sidekick fans may prefer the more robust T-Mobile Sidekick LX. |
| Service Provider | T-Mobile | T-Mobile | T-Mobile | T-Mobile | T-Mobile |
| Cellular technology | GSM / UMTS | GSM | Info unavailable | GSM | GSM |
| Band / mode | GSM 850/900/1800/1900 (Quadband) / UMTS 85/1700/2100 (Triband) | GSM 850/900/1800/1900 (Quadband) | Info unavailable | GSM 850/1800/1900 | GSM 850/900/1800/1900 (Quadband) |
| Wireless Interface | Bluetooth 2.0 | Bluetooth | Info unavailable | Bluetooth | Bluetooth |
| Weight | 0.4 lbs | 5.7 oz | 5.61 oz | 7 oz | 5.3 oz |
| Full specifications | Full specifications | Full specifications | Full specifications | Full specifications | Full specifications |
| Buying choices | Pricing is currently unavailable. | Pricing is currently unavailable. | MSRP: $99.99 See manufacturer website for availability. |
| Pricing is currently unavailable. |