I bought my Samsung galaxy s4 from eBay a month after it was released. I have not had any problems with it but about a month and half ago, my device started showing up a message that said like "You device cannot detect your sim card. Restart the device to detect the sim" The title of this error is "Restart device" and I cannot click on anything other than restart. At first, it only happened once in a while but then it started to occur more than three times a day. I still have my warranty with Samsung so they took it in and replaced the Sim card port. When I got the phone back, the phone seemed fine but four days later, it was the same thing over again. It actually started to happen every hour or so. It got a point for the device didn't even realize that a SIM card was inserted at all. I sent it in again and they replaced the same part. I got it back just two days ago and the error message showed up this morning. I am wondering if it could just be an app that's messing up with the device. Also, I have also been getting a message stating that an app tried to do something (Sorry, that's not detailed but its all I can remember). This message was also received on my HTC phone when I was using that for the time that Samsung was fixing my S4.
I also want to mention that resetting the device does not help at all. I have done it before I sent it to Samsung and Samsung has done it too.
I also want to mention that resetting the device does not help at all. I have done it before I sent it to Samsung and Samsung has done it too.
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