A major point though:
if you configure an SD card as "Internal Memory", and then that phone has problems and won't reboot, everything you stored on that SD card is lost to the winds.... EVERYTHING !!!
To me, it is insane to use an SD card as internal memory. You have just thrown away everything you own, if the slightest little hiccup occurs and that phone won't work.
SD cards configured that way are totally unreadable by any other device, a phone, a PC, nothing....
Rethink your approach carefully....
Far better that you configure your cameras and other apps to Default to the SD card for document/picture storage.
Then there will be more than enough internal memory for apps to use...
I have almost 300 apps on my phone, and still more than enough internal memory for everything to work just fine.