On some devices like the BlackBerry Priv, you can manually force the network to 2G/EDGE in settings to prevent the phone from constantly searching for weak 3G/4G signals, which drains battery and causes drops. 2. Hardware Signal Boosters
Keeping your phone charged is vital; mobile devices often reduce radio power to save battery when the charge is low, leading to weaker reception.
Activating a "Keep Alive" function sends small data packets (pings) at regular intervals to prevent the network from timing out due to inactivity.