This is really strange because I don't have this when I force 2G On Monday, November 28, 2016 at 3:12:32 PM UTC+1, Alexis LE GOFF wrote: > > Hey, > I am using a mediatek device running rooted android 4.4. I am using M2M > sim cards with private APN, private static IP and global roaming plan. > Each of my sim have its own static IP. I can therefore ping them from my > server on the VPN. > But few minutes/hours after boot, devices becomes un-addressable. If I try > to ping it from the server, I got no answer. sometimes it is only after 2 > minutes! > The only way to put the device addressable again is to send a packet from > the device to the server > > Questions: > > - How can I avoid this? > - Is is possible to detect that the device is not reachable? If I have > a look at `adb shell netcfg` the device always have an IP, even when it is > un addressable from outside. > >
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