In many countries (USA, EU, UK, Australia), modifying transmit power or unlocking bands that your device isn't certified for violates FCC or CE regulations. You could face fines or have your device confiscated.
DNS fails after 30 hours & daily scheduled restart stopped working
: A medium-severity Denial of Service vulnerability was identified in related models like the ZTE MC889A Pro
(Invoking related search term suggestions.)
Most patches are delivered Over-The-Air. Check for updates under Advanced > Update in your router's admin panel (typically at 192.168.0.1 or 192.168.100.1 ).
If ZTE ever releases an "OpenWRT" version of this, they'd own the market. Until then, we patch.