Check your carrier’s app for data usage. If you've hit your cap, you may need to purchase a data "add-on" or wait for your billing cycle to reset. 3. Wi-Fi Band Interference (2.4GHz vs. 5GHz) Most modern phones allow you to choose between two bands:
If you are at a crowded stadium, a busy airport, or in a dense city center at 5:00 PM, you’re competing with thousands of others for the same cell tower. Carriers often prioritize "on-device" data over "hotspot" data during peak times. why is my hotspot download speed so slow
The most obvious reason is the most common. Your hotspot can only "give" what it "gets." If your phone only has two bars of LTE or 5G, the Wi-Fi signal it broadcasts will be inherently limited. Check your carrier’s app for data usage