: If the signal keeps dropping to 3G, check if your firmware allows you to "lock" the network mode to 4G LTE Only in the connection settings.
If you are uncomfortable with low-level flashing, consider using a capable dongle that supports secure, remote updates. Otherwise, treat 4gdong001 firmware updates like brain surgery—triple-check every step.
Many of these sticks are sold with "WiFi" capability. If your stick has a chipset, it is actually a small Android computer.