My device is red on explorer.neuron.wrold

Make sure the device is connected to the internet , and is funded with hbar using https://portal.hedera.com/faucet. You can check your device's balance in https://hashscan.io/testnet/home.

Sometimes, devices do a hard-reset. To check if this has happened to you check if your device is still neuron enabled

If you still cannot resolve the red mark then grab a copy of the neuron logs before contacting us.