Palm Trēo

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"Treos" redirects here. For the post-hardcore band, see The Receiving End of Sirens.

The Palm Trēo is a line of smartphones originally developed by Handspring, which was bought by Palm, Inc. They are now manufactured and maintained by Palm, Inc. Trēos have a number of integrated features such as the ability to check the calendar while talking on the phone, dial directly from a list of contacts, and send email messages. Recent models include a built-in camera. Traditionally, Trēos run Palm OS which allows synchronization with both Mac OS X and Microsoft Windows, but newer models also have editions that run Windows Mobile.

[edit] Treo Devices

A Trēo 300

As of September 2007, there have been seventeen Trēo models, listed below in order of release. Trēos through the 680 series have used Palm OS; Beginning with the 700 series, Trēos are using both Palm OS and Windows Mobile. The Trēo 700w was the first of the 700 line and the first Trēo to ever use Windows Mobile.

Officially announced models:

Release date	Models	PDA Notes	Phone Notes	Other Notes
	Trēo 90	Only a PDA, runs Palm OS 4.1H, 160x160 12-bit CSTN colour display, internal battery	no phone component is built-in
2002	Trēo 180	Monochrome screen	Dual-band GSM	flip form factor
	Trēo 180g	Monochrome screen, Graffiti input instead of keyboard	Dual-band GSM	flip form factor
	Trēo 270	Color screen, backlit keyboard	Dual-band GSM	flip form factor
	Trēo 300	Color screen, backlit keyboard	Sprint branded CDMA unit	flip form factor
2003	Trēo 600 (GSM)	Color screen, five-way navigator, backlit keyboard, Palm OS 5, camera	Quad-band GSM	candy bar form factor
2003	Trēo 600 (CDMA)	Color screen, five-way navigator, backlit keyboard, Palm OS 5, camera	Sprint and Verizon branded	Candy bar form factor
2003	Trēo 600 (CDMA)	Color screen, five-way navigator, backlit keyboard, Palm OS 5, no camera	Sprint and Verizon branded	candy bar form factor
2004	Trēo 650 (GSM)	320 x 320 resolution screen, removable battery, 0.3 MP camera, Palm OS 5	GSM, GPRS, EDGE-class 10 radio Quad band (850/900/1800/1900 MHz)
2004	Trēo 650 (CDMA)	320 x 320 pixel resolution screen, Bluetooth 1.1 wireless support, removable battery, 0.3 MP camera, Palm OS 5	GSM, GPRS model: 850/900/1800/1900 MHz world phone; CDMA model: 800/1900 MHz digital dual-band
2006	Trēo 700w (CDMA)	240 x 240 pixel resolution screen, originally 32MB RAM, updated to 64MB^{[citation needed]}, Bluetooth 1.2 wireless support, removable battery, 1.3 MP camera, Windows Mobile	CDMA2000 EvDO network—compatible with 1xRTT network, VZW
2006	Trēo 700p (CDMA)	320 x 320 pixel resolution screen, Bluetooth 1.2 wireless support, removable battery, 1.3 MP camera, Palm OS 5	CDMA 800/1900MHz digital dual-band, CDMA2000 EvDO network-backwards compatible with 1xRTT and IS95 networks
2006	Trēo 700wx (CDMA)	240 x 240 pixel resolution screen, 64MB RAM^{[citation needed]} Bluetooth 1.2 wireless support, removable battery, 1.3 MP camera, Windows Mobile	800/1900MHz digital dual-band Palm® Trēo™ 700wx smartphone for Verizon Wireless CDMA2000 EvDO network—compatible with 1xRTT network
2006	Trēo 680 (GSM)	320 x 320 pixel resolution, removable battery, 0.3 MP VGA camera, bluetooth 1.2, Palm OS 5	GSM, GPRS, EDGE-class 10 radio Quad band (850/900/1800/1900 MHz)	First Trēo phone to have the stubby antenna appendage removed.
2006	Trēo 750v and 750 (GSM)	240 x 240 pixel resolution, removable battery, 1.3 MP camera, Bluetooth 1.2, Windows Mobile	GSM GSM bands: 850/900/1800/1900, GPRS, EDGE, UMTS UMTS bands: 850/1900/2100, HSDPA (via unsupported software patch)
2007	Trēo 755p (CDMA)	320 x 320 pixel resolution, removable battery, 1.3 MP camera (subject to change), Bluetooth, Palm OS 5	CDMA 800/1900MHz digital dual-band, CDMA2000 EvDO network, backwards compatible with 1xRTT networks. First CDMA Trēo to lose aerial antenna. Sprint and Verizon only. Released May 2007.
2007	Trēo 500 (GSM)	320 x 240 pixel resolution, no touchscreen, removable battery, 2 MP VGA camera, bluetooth 1.2, Windows Mobile 6.0	GSM, GPRS, EDGE, UMTS -class 10 radio Quad band (850/900/1800/1900 MHz)	Launched September 12, 2007 for European Vodafone network.
2007	Palm Centro (CDMA)	320 x 320 pixel resolution, removable battery, 1.3 MP camera, bluetooth 1.2, Palm OS 5	CDMA 800/1900MHz digital dual-band, CDMA2000 EvDO network, backwards compatible with 1xRTT networks. Sprint exclusive at launch date. Released October 14, 2007.	Product SKU PTR690HK aligns this phone with the Trēo family, however it was branded the Palm Centro.