The solution to improves input signals to the EZR33 router.
3.1.4 - Upgrade Antenna
When you have a weak signal reception, please refer to Improve Weak Signal and adjust the direction of the flat sides on the default Omni antenna to get a little better signal reception.
If the signal is very poor, please consider upgrading the 4G mobile antenna with a higher-gain antenna. The directional LPDA antenna and MIMO panel antenna can point towards the cell tower and receive stronger 4G signals.