Probably a dumb question but I am new to this and too the forums. Anyways, I have the Lumia 640 on MetroPCS and I have not received the windows 10 mobile update OTA. So I was wondering if I could become an insider and download the latest production build then leave the program? Or do I have to stay in it and just select production builds? I just want the current releases, not the preview builds. This will be my daily driver. Thanks in advance!