I am also unable to pair the NanoV2 with my Android 7.0 smart phone using any of the BLE_Examples in Arduino 1.8.5. For example, by changing SimpleChat.ino as follows the NanoV2 shows up in Available Devices, but attempts to pair time-out. Scanning and connecting to TXRX seems fine via Nordic’s nRF Connect Android app.
ble.accumulateAdvertisingPayload(GapAdvertisingData::BREDR_NOT_SUPPORTED | GapAdvertisingData::LE_GENERAL_DISCOVERABLE);
Have you made any progress with this problem or is RBL tech support still engaged?