Greetings everyone: I have a samsung captivate glide with Android 2.3.5, it's a 4G phone, I tried to do a samsung system update by OTA and got this error message: "unknown error, it's possible that the server is unavailable", I also tried to do a software upgrade but I don't have the software, I'm pretty comfortable with PC but not cell/Android, and one of the apps I'm using (Whatsapp) stopped working, I think the new version does not support Android 2.3.5. Anyone knows where I can find a new version of Whatsapp for Android 2.3.5? I tried to do update and it always failed. Or if there's a way to make Whatsapp to work. Now everytime I try to load it, it said that my version is obsolete and I need to update to a newer version, so I can't use it. Thanks for your comment suggestion.

Whatsapp upgrade does not support anything lower than Android 3.0.