Same problems here. System memory usage progressively increases from about 700MB when first switched on to about 1.4GB after a day or so, at which point the phone is unusable with all apps, including the desktop, constantly being evicted from memory and restarted from cold. The phone even loses track of the SIM card and says I don't have a SIM intermittently. This problem started in 7.0.0 for me, and is still htere in 7.1.1.
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