This is a big issue as there are already many posters here having the same problems. My Xperia C is having the same problem with internal memory. Can Sony pay attention and do something? I had installed only few apps, and uninstalled games that came with the machine. Today I have uninstalled 9 apps; and yet there is still insufficient internal memory to install anything else - even a small app! So folks, do not uninstall any important apps but just keep on using them, if you have to. If you uninstall, it will be likely you may not be able to install them back to your phone again. That was the problem with me.
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