Will I be able to cancel my number parking settings when abroad?
You can cancel number parking at any time. Just insert your regular SIM card and turn off call forwarding in the phone settings.
On iPhone, go to Settings > Phone > Call Forwarding and turn forwarding OFF.
On Android, open your phone Dialer, tap Menu and choose Call Settings > Call Forwarding > Voice Call > Always Forward and turn off call forwarding.
You can only park your regular number in home country, so don’t cancel your parking settings unless you are sure you need to.