It depends, but i can't help suspect that sharing the increasingly saturated 2.4Ghz band (microwave ovens, wifi, who knows what else), and being built around channel hopping (apparently this lead to some issues with US regulators) makes for a fault prone system.
This because while i have had problem on urban streets with a device in my hand and one in my ear, i have observed rurally living relatives that can walk around their whole house with the phone sitting in some corner and not suffering a connection outage.
This because while i have had problem on urban streets with a device in my hand and one in my ear, i have observed rurally living relatives that can walk around their whole house with the phone sitting in some corner and not suffering a connection outage.