Samsung Galaxy S5 customers over Sprint's network in the United States will be receiving an minor over-the-air update soon from the carrier, according to the people on Sprint's Community forum. The new software update is dubbed as G900PVPU1ANE5, and is said to be rolled out in batches, that brings the new Wi-Fi Calling enhancement or fix to the smartphone. Once you have installed this new update, you'll be able to make and receive calls and also text messages over Wi-Fi connection instead of Sprint's network, when your handset is in a poor coverage area.
Source: Sprint , Android Central