How do I fix mobile data dropping when I have signal?

tailzx

    For the past few months on my Note 8, my mobile data keeps randomly dropping even when I have good signal.  I can regain mobile data by going to settings>connections>mobile networks>Network operators> select automatically.  When I hit select automatically, mobile data instantly reappears on my notification bar as if my phone was already connected but it just didn't want to use it.  I can also go to airplane mode and back out of airplane mode to regain mobile data.  I've tried resetting my network settings, being in safe mode, and even factory resetting my phone.  This issue still happens.  This issue did not happen for the first few months I've had my phone.  How can I tell if this a T-mobile issue or my phone?

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