Have you tried resetting network settings? Try that if that works. If not then try rebooting your wifi. And doing a soft reset on your phone by pressing the power button and volume down button for 10 secs.
Yes already tried, and also tried all Network Mode it's same... On Network Mode if I put on 2G full sign very low data, 3G is OK, 2G/3G auto-connect is same was 3G, LTE/3G/2G auto connect it shows 4G and sign is only 2 and data is not very bad, the last is 5G/LTE/3G/2G auto connect it shows 4G and sign is only 2 and data is very bad.