BLU released a maintenance update for the R1 HD back in November, which would enable support for T-Mobile VoLTE and Band 12. However, the update was only available to Amazon Prime exclusive version of the smartphone.
Today, more than seven months after the initial release, BLU allows customers who purchased the standard R1 HD model to download and install the update.
The official changelog mentions the update adds the VoLTE client for T-Mobile and Band 12 support, as well as the Android Security Updates. Unfortunately, it’s unclear what security patch the …