The ability to send messages from an iPhone to an Android device using a Wi-Fi network circumvents traditional SMS protocols that rely on cellular service. This functionality allows for communication when cellular signals are weak or unavailable, offering a connection alternative. For example, one can send a text message from an iPhone connected to a home Wi-Fi network to an Android phone across town that is also connected to Wi-Fi, bypassing cellular carriers for message delivery.
The importance of this capability lies in its cost-effectiveness and accessibility. It enables users to avoid SMS charges, particularly beneficial for those with limited cellular data plans or when communicating internationally. Historically, this type of communication was limited by platform incompatibility, but advancements in messaging apps and protocols have facilitated cross-platform messaging over internet connections.