Viber already active on PC; want to activate the same Viber account on Android without SIM card

I already have Viber installed on my PC and want to install it on my Android now. Want to use the same old mobile number with Viber but I cannot receive SMS on that old number. I don't know how to receive a Viber activation code on my PC Viber, for example. How to activate Viber on Android without a SIM card?