UPDATE:
As you know, the "issue" is that the manufacturers/carriers "imply" that the primary memory is augmentable, when it's actually *not* augmentable with the addition of an sd card:
So, I took up the carrier on their offer to buy a replacement phone, with full value being given for the original phone:
After I swapped out the $200 0MB LG Optimus F3 for the $400 12GB LG/Google Nexus 5, here are the 100 apps (shown on the left) which took up the first 4GB of primary memory:
Below are the 60 or so apps which can be considered "typical" for many users, and which take up at least 2GB of additional primary memory on this brand-new Android phone.
[Communicate] Gmail Email People Hangouts Viber Skype Google Voice [Social] Snapchat Instagram Facebook Twitter Line Linked-In Google+ [Web] Chrome Firefox Google Search News & Weather [Map] Google Maps Navigator CoPilot My Tracks Google Earth [Game] Temple Run 2 Hungry Shark Candy Crush Play Games [Camera] Camera Focal [Audio] Phone Pandora Play Music Smart Voice Google Translate Automatic Call Recorder [Video] YouTube VLC Flixster Fandango Plex [Files] ES File Explorer Google Drive Downloads Gallery Photos Dropbox iTunes [Todo] Calendar Clock Keep [Shop] Calculator Out of Milk Barcode Scanner Red Laser [Office] Office Mobile QuickOffice Kingsoft Office [System] Play Store Settings Battery Doctor Clean Master WiFi Analyzer TeslaLED [Security] Lookout or AVG Prey Device Manager [Anonymity] Orbot Orweb ChatSecure DuckDuckGo Proxy Mobile Firefox Add-OnIf you know of a "typical" app which is missing, please let us know so we can help others not make the same mistakes I idiotically made.