OTAs
So I tried updating while rooted, and found that that couldnt be done.
So I unrooted, and now when I check for updates, it says everything is up to date.
I have had this thing since launch, so I know theres a few updates to download.
If anyone can help that would be awesome.
I also did clear cache
I'm rather new to Android and rooting, but I've been rooted on my SGS3 since the beginning of July, so I've experienced several OTA notifications. I know you cannot apply an OTA when rooted, generally, but that most Developers will actually update their custom ROMs when a new OTA is pushed. That has been my experience thus far, and how I've "kept" my phone up-to-date. In the change logs you can usually identify which OTA their ROM is based on, and make your decision from that information. Also, I believe most OTAs are carrier-based and not necessarily intended to update the OS or UI, so some of them may not be necessary. The important thing is the baseband (modem) version, as this can directly impact your reception and data speed. There is an excellent tool intended strictly for flashing a new modem, developed by clark44. The link is here:
http://forum.xda-developers.com/showthread.php?t=1816530
I would suggest starting at the top of the list, running that modem for at least 2-3 days, then flashing the next one and repeating the process - until you find the one that works for your phone, in your area, based on the places you visit the most frequently.
I hope this helps.