Unfortunately, according to some Samsung Galaxy S10+ owners, it appears that they have run into LTE and connectivity issues with some carriers. Based on these reports, it seems that some of these device owners are experiencing poor signal strength of their devices. This has affected most of the major carriers such as AT&T, T-Mobile, and Sprint.
It has also been reported that the phone suffers from a death grip issue, where holding it wrongly without a case can further impact the signal strength. According to some users, they have managed to find a way around the problem on Sprint by disabling Band 41 and 25, but it doesn’t really feel like a long-term solution, especially for a phone that you have paid so much money for.
It is unclear whether or not this is a software or hardware issue, but hopefully, Samsung is aware of the problem and are working on finding a solution to it.