Using it, you can track what cell towers you are connecting to, the strength of the signal, etc and try to determine the parameters that the phone uses to switch cell towers. It was written for GSM phones, but It works on CDMA phones as well.
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Ice Cream Sandwich support
--Adds support for later versions of Android (Please let me know if it doesn't work for your version)
--Screens now shows latest events at top of list (thanks to all who suggested that)
--Fix for "Mobile Network Data State" field (formerly called "Network State")
--Allows user to to save the data to a comma delimited file (csv).