For some reason I can't upgrade it. The DM is suppose to notify me that I can upgrade to a newer OS. Currently I have 220.127.116.11 running on my 8120 and I've download and installed 18.104.22.168. Application Loader does nothing to tell me there's an upgrade. I have T-Mobile and I have already deleted the vendor.xml. I'm not really sure what else I can do or what I'm missing, any help would be apperciated. Thank you in advance.