Storage problems

I have two identical phones (Xtreamer Q). One of them id reporting 13.14 Gb internal storage, but the second - 0.98Gb internal storage and 12.35Gb phone storage. When I try to install any application on the second phone it says "Not enough memory", but I can't find how to connect together the two memory types. What may be the problem - is it software or hardware bug? May be I have to change something in the preferences - but what?
P.S. I have screenshots of both phones with the storage report, but as a new user I can't attach the screenshots).
Thank you for help.