T-Mobile issues fix for IMS error that rendered many LG phones useless

T-Mobile has released a patch to address a software issue that rendered many LG smartphones inoperable. An issue with the IMS framework, which handles SMS and phone calls over an IP network, was to blame.

source https://www.androidcentral.com/phones/t-mobile-issues-fix-for-ims-error-that-renders-many-lg-phones-useless