The unannounced LG K30's leak could mean that T-Mobile is getting ready to add the model to its offer. Spec-wise, the LG K30 looks like an entry-level model. It comes with a modest 5.3-inch HD LCD, a 13 MP rear shooter plus a 5 MP selfie, a rear fingerprint reader, and an unnamed quad-core SoC that seems to be part of the Qualcomm Snapdragon 400-series coupled with 2 GB of RAM and 32 GB of storage.
https://www.notebookcheck.net/LG-K30-specs-leaked-on-T-Mobile-s-support-page.301838.0.html