Hi all. I own a Xperia M4 Aqua and still have the same identical problem. I've had this phone for ...what...a couple of weeks?! and and I've had trouble with sim card detection ever since. When I first inserted the sim card I noticed that it doesn't really click -if you know what I mean- and the only way of solving this is shutting the slot hoping the sim will work fine. As a matter of fact whenever I push the closed slot the phone restarts. I am afraid it's a vile mechanical problem...and if so I'll go back to some other brand I like more. Can anyone confirm my guess?
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