UleFone S9 Pro

The internal memory capacity specifies how much space will be left for your files. If your phone's internal memory is under 1GB, you will only get enough space for the most basic necessities needed to run the phone. You will be able to store a few contacts and calendar events. A larger flash memory with a 16GB capacity is the least you need if you want your phone to be "smart" in the true sense of the word. If you buy a model with 32 or 64GB, you may not even need an extra memory card. An internal memory capacity of 128GB or more gives you the option to install all the games you love.