Hi. After reading all those articles about the carriers not wanting to install kill switches in the phones, I thought I'd check up on how Google's Android Device Manager is working. Answer: Isn't. Although I'd registered my S4 with them back in May (and it worked fine on subsequent spot checks), when I asked it to locate my phone, it searches for a bit and says the location is unavailable. I also told it to "ring" the phone. It responds by saying the phone has been rung, but there is silence from the phone. (I'm not going to tell it to lock or erase the phone -- with my luck, that part would work.) But I'm concerned as to whether maybe this is something else that went wrong with 4.3. So, has anyone else who was registered with Android Device Manager before 4.3 tried it after 4.3, and is it working for you?