Where do I find a full error log/code book ?

[stalemate1]

So I can look up error 406, 908 etc...

 

[Rukbat]

On the web. There are Android errors, there are individual app errors (an app developer is free to use any error number to mean anything), there are TCP stack errors (like 404 being "page not found"). There's no single list of all the errors you might get on an Android phone. You can do a Google search of error codes or something like that, then spend a few years putting them into a list that can be searched by a human being. (You'll get tens of thousands, at least.)