We are certified for most major manufacturers. Hills, bridges or tunnels can temporarily block wireless signals. Fog or inclement weather can also interfere with wireless communication. Buds covering trees can block reception. When they grow into leaves, the problems disappear.
Raindrops clinging to pine needles after a heavy rain can also have a similar effect.
When using your phone near a large body of water, your phone may pick up stronger signals from a wireless carrier across the water, causing your roam indicator to go on. If you re on the border of a service area, your signal will be more vulnerable. A cell may be temporarily out of service. Check to be sure your antenna is fully extended. You will need to change the system back to your home system.