I had a Lg Stylo 2Plus from T-Mobile,it was very slow,  lagging,  then the UI stopped and the LG Server stopped,  couldn't use anything but phone dialer, I called T-Mobile,  told me to backup important information to sd card or google drive and do a factory reset,  if still having issues,  see if phone has a warranty still left,  exchange phone,  I did that and a day later, the phone was having the same problem,  I research lg phones and heard. The lg g3, g4, g5 and lg v10 had alot of complaints and some with the Lg Stylo 2 plus,  server and UI issues,  so I went to the store  and told them my problem with my phone,  checked on a upgrade,  I was on T-Mobile jump plan,  I could upgrade my phone by giving my junk phone for a different brand,  they had a sale for the Samsung S7 edge,  $200 of full price,  so I got the phone and been using it since April 1St,  2017 and what a much better,  stronger, phone,  and more memory  4g memory with 32gb of storage, crystal clear 12 megs pixel camera, remember a lagging phone  needs to be reset,  backup first,  if still having trouble, check if it has warranty left,  if so,  do it,  if not get another  phone , that's what I think is best!