C5 Ultra becomes unresponsive at random times.

This phone is like liquid most of the time then all of a sudden it slows right down, switching between apps can take over 10 seconds, keyboard typing can be 20 seconds behind. Ive tried 2 hard resets and only installed Google apps. Maybe Sony hasnt plugged the 5.0 lollipop bugs in this firmwqre. Anyie else having the same problem?

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