The device is not working after Region has been set

[kzhrassul]

Hi all! I have the T-Beam ESP32 LoRa device.
I was able to connect the to iPhone via Meshtastic app. After connection was established, I was asked to set the region. I set the region and after that, device stopped to responding. Device is not searchable via Bluetooth. On device's screen there are only Meshtastic logo and firmware version.
How can device be reset?

Thanks

[madeofstown]

Unplug all power sources including battery. Then plug them back in.