Very odd. I just had this same thing happen on my iPhone 5. What carrier do you use? I use a Verizon reseller and a month or so ago, it started giving me pop-ups every couple hours that said "No SIM" or "Invalid SIM" and wouldn't let me access texting, calling, or data (Wifi still worked) and would stay like that until I restarted.
I contacted the Verizon reseller and they said I needed to buy a new SIM (just got this one in the last 6 months). I didn't want to pay for that so I just waited and it hasn't done it again in at least a month.
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How long has this been going on? Have you checked if the chassis pushes on the SIM or board? I don't know much about Samsungs so pardon my question, can your phone tell if the cover is on or not? If not then it has to be a physical problem if taking the cover off helps.
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How long has this been going on? Have you checked if the chassis pushes on the SIM or board? I don't know much about Samsungs so pardon my question, can your phone tell if the cover is on or not? If not then it has to be a physical problem since taking the cover off helps.
You could also try contacting Samsung, your carrier, or wherever you bought your SIM; probably won't help but it's worth a try.
Very odd. I just had this same thing happen on my iPhone 5. What carrier do you use? I use a Verizon reseller and a month or so ago, it started giving me pop-ups every couple hours that said "No SIM" or "Invalid SIM" and wouldn't let me access texting, calling, or data (Wifi still worked) and would stay like that until I restarted.
I contacted the Verizon reseller and they said I needed to buy a new SIM (just got this one in the last 6 months). I didn't want to pay for that so I just waited and it hasn't done it again in at least a month.
How long has this been going on? Have you checked if the chassis pushes on the SIM or board? I don't know much about Samsungs so pardon my question, can your phone tell if the cover is on or not? If not then it has to be a physical problem if taking the cover off helps.
You could also try contacting Samsung, your carrier, or wherever you bought your SIM; probably won't help but it's worth a try.
Let us know if you figure it out.