I've 6 Estimote beacons near to Android Device. And, i installed demo app and in that device showing/detecting only beacons out of 6 beacons (All 6 beacons are with in range only).
So, i want to know that is there any limit to detect beacons from Android device (App)?
There is no such limit.
If not all beacons are showing up, then it can be something with the beacons themselves. You might want to contact Estimote Customer Support (contact@estimote.com) for help with troubleshooting the issue.