Tune these settings to get a better mobile network connection. This article explains the settings in *#*#4636#*#* inetrface.

Some information about Anki's internal representation and database structure.

Also see: https://github.com/ankidroid/Anki-Android/wiki/Database-Structure

Note that some of the info are out of date today. For example, the the information about decks are also accessible from a new "decks" table that's not mentioned on either of the document.