Starting to bog down

[Bigleftyinaz]

Over the last few weeks,my thunderbolt is starting to act up,besides the normal reboots.

Seems sluggish .Backing out of text messages takes a while,sometimes I think it has locked up.

I have installed advance task killer ,but that fix didn't last long.

Now, it's back to how it was before,slow.

Any tips to fix?

 

[KlineAJ]

Factory reset

 

[xxtsxx]

I had the same problem. Try limiting the messages to 300 or less per contact it has helped mine and it seems to be back to normal
Edit: actually about 100 for best performance but it's not bad at 300