Well, if the phone is running its original OS, then you won't be able to move apps to the SD card. However, if you have or can update the OS to Android "Marshmallow" then you might be able to turn the SD card into "Internal" storage rather than "External". It will also depend on if the manufacturer has removed this option on that device. They actually do this sometimes.
How to turn external SD card into internal storage on "Marshmallow".
NOTE: Please be sure you start with a blank SD card. It needs to be blank because when the card is converted to "Internal" storage, it will be formatted (wiped) and encoded (making the cards data only readable by that device).
1. Go to device “Settings”, then select “Storage”.
2. Select your "SD...