A:AnswerThis is beyond a software update. This is a hardware issue.
You would need an entirely new phone from BLU that would work with 5g. And 5g is not cheap.
Right now BLU doesn't have any 5g offerings and they likely won't for at least 2-3 years. BLU cuts corners by using the cheapest hardware they can get. They simply can not make a 5g phone cheap.