LB1120 Connects then Stops Working after a while

[vintagegal]

Okay, so  I bought the LB1120 Modem 3 months ago. It worked fine at first. Then all of a sudden it'll do the whole "Connected no internet" deal. I resolved it once. Now its doing it again. I have a solid amber light as the first line and the last line is green and that is all I get. I have factory reset it and started it over, and nothing is working. I have a straight talk sim card through T mobile in it and the APN is correct and everything. What could be the problem? It doesn't need any updates at all. It's frustrating because it seems to do this back and forth at times randomly. I just refilled my data too and it has plenty. Tips? I may try removing the sim card and putting it back in but I am not sure what good it'll do.