Hi there and welcome to the forums! I went ahead and moved your thread out to the main space for the N3, that way you're more likely to get quick help.
I'm not too familiar with the GO texting app. Would you be willing to switch back to the stock samsung texting app for a day or two, to see if the issues happen using that? It would help us figure out if it's an issue with your phone or just the app you're using to text.
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