New SIM activation: Do I need to reboot? I recently received a new SIM card from the telecommunications service provider I switched to (I kept my mobile number).  This is what I have done so far:


Went through the "activate SIM online" process
Powered off my mobile
Replaced SIM cards
Started my mobile again


The mobile appears to have detected the new SIM alright (I can see the new provider's name) but it says "emergency calls only".  I checked with the new provider's support and they said it may take up to an hour to get activated.

Now I am wondering, do I need to reboot my phone again before the new SIM can connect to the network, or are there other means of forcing the SIM to try to reconnect, such as


switching mobile data off and on again, 
turning on flight-mode temporarily
...anything else?
Usually a new sim card, before activation, will not be recognized by the phone at all (it will either say 'no service', or 'no Sim')

So, being that your phone recognized the carrier, it must be that the Sim is fully functional, and the reason that it says emergency calls only, is because the number wasn't fully ported, as you have stated.

Your phone should be able to detect automatically, the ability to make calls.
If it doesn't, then going into airplane mode for a moment should do the trick.

You can also keep trying to start a call, this will make the phone look for connection