Metro PCS is part of T-Mobile and runs off their network for data, voice and messaging. The network operates 2G/3G & 4G LTE speeds
Coverage maps are becoming more and more standard amongst service providers as the demand for quality voice and high speed data are at their peak.
Currently, many wireless carriers give you the option to verify network coverage at your home address or local zip code. These maps are a great way for potential customers to determine what type of coverage they can expect.
Coverage maps typically have some sort of indication as to what type of speeds you'll receive (i.e. 4G LTE, 3G, 2G, etc..)