Phone not working properly

I was texting on my q link phone it was working and then all of a sudden stop it won't let me text or call it keeps saying network is down but when I call Sprint they say there are no outages for the area I've down a factory reset and master clear but still get nothing ive called qlink they will not replace it even though not 2months old like every 20 texts it works for a few mins then stops

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