Samsung Crono is a CDMA phone, carried by U.S. Cellular, works on CDMA 20001x and EVDO Rev. 0 network, at cdma 800 and 1900 Mhz frequency. Samsung SCH-R260 is a basic cell phone that offers a clamshell model with numeric keypad and dedicated for basic communication purpuses such as calling and texting.
Samsung Crono CDMA EVDO Rev. 0 Specs:
Network : CDMA 20001x, EVDO Rev. 0
Band : Dual CDMA 800, 1900 Mhz
Model : Clamshell
Display : 2 inches QVGA TFT, external display: 1,7" CSTN
Camera : VGA 0.3MP
Music : MIDI
Video : 3GP, Playback video
Browser : WAP 2.0
Messaging: SMS, MMS, Email
Memory :Internal 51 MB
Connectivity : Bluetooth 2.1, microUSB 2.0
GPS : A-GPS
Battery : 800 mAh
As basic cell phone, Samsung Crono is equipped with interesting feature, take a picture and save on its built-in 51 MB of memory or send it as MMS. Samsung Crono CDMA is available in US Cellular since May 30 2011.
More detail :
http://www.samsung.com/us/mobile/cell-phones/SCH-R260DAAUSC-features
http://www.uscellular.com/uscellular/cell-phones/showPhoneDetails.jsp?productId=prod190146