Its due to either software or hardware problem , even i was facing same issues with Sony M4 Aqua Dual E2363 (Indian Model) and tried replacing SIM , SD card but nothing worked. How can sony blame on Sim & SD card and its Sony responsibility to do a proper testing before releasing phones to market. Can you imagine how much frustrating for a user who paid 24K for phone and it keeps on restarting or shuts down abruptly. Finally i sold this phone on Reglobe and bought Moto g 3rd gen phone and using same SIM (with micro sim adapter) & SD card without any problems. Shame on Sony for cheating customers.
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