I’m going to spend some time in another country before I reach my destination country. What should I do about Roamer?
You won’t be able to receive any calls until you reach your final destination and authorise a local SIM.
If you are staying in a transit country for certain time and it is necessary for you to receive and make phone calls, you will have to purchase and authorise a local (transit country) SIM.
As soon as you leave the transit country, you will be asked to insert a local (destination country) SIM. Simply replace the transit country SIM with a destination country SIM and authorise it.