Recently upgraded to an unlocked note 20 here in the US. Inserted my Lycamobile SIM, which worked very well in my older phone. Data works perfectly OK. However, the RSSI bars are replaced with a crossed circle. SIM settings says "Not registered". Because of this I have no incoming calls or text. However, if i try to dial out a number, it does work and the RSSI bars do come on during the call.