While I was working on my laptop I noticed the smartphone had just restarted by itself; After I finished whatever I was doing and I finally looked at it I couldn?t help noticing ? besides the weird sudden reboot that just happened by no apparent reason ? Samsung SIII phone was actually frozen in the ?Samsung Galaxy SIII? start-up screen; and it wouldn?t go ahead from there. Does anyone know what to do??? Because in my country no repairman could fix it.