When comparing GEMINI PDA vs Nokia N900, the Slant community recommends Nokia N900 for most people. In the question“What are the best smartphones for GNU/Linux enthusiasts?” Nokia N900 is ranked 3rd while GEMINI PDA is ranked 4th. The most important reason people chose Nokia N900 is:
The N900 comes with Maemo 5 installed which is a Linux distribution. There are also some Debian versions that work on this phone.
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Pros
Pro Supports other Operating systems
There are other Operating Systems available like: SailfishOS or Debian.
Pro Has a physical keyboard
It has a physical keyboard so it can be used as a very portable net/notebook alternative.
Pro Very compatible with Linux
The N900 comes with Maemo 5 installed which is a Linux distribution. There are also some Debian versions that work on this phone.
Pro Has an active community developing applications and OS updates
The N900 has an active community, developing applications and OS updates and updating packages for the device when needed. You won't get facebook for it, because facebook itself cut off the leash to the older phone OS's, but if you want that you shouldn't want this device either unless you can live with the browser version. It's for those that want a pocketable PC.
Pro Has a physical keyboard
The N900 has a physical keyboard that can be opened by sliding the screen up or down from the side.
Pro 64 GB internal storage. Best phone ever!!
Cons
Con Battery
Makes it a useless phone.
Con Outdated
The N900 was first released in 2009 and it shows. The hardware is outdated (256MB RAM for example) and there are no more software updates being released.