This might sound stupid, but numerous people report that doing this, often numerous times, will eventually end up with your download speed increasing. If you’re having problems with PSN not giving you the download speed your connection allows, give a few of these a try. While there’s no definitive solution to get better download speeds, there are numerous hints and tips that are reported to work.
Download speeds on PSN for PlayStation 4 and PlayStation 3 are notoriously up and down, and with game downloads now often exceeding 40GB, slow speeds can be a nightmare.