SIM card not recognized in new phone

[Japonica]

My old cellphone died, bought new phone and received new sim.Went to my account to change the SIM #.

My Umidigi Note 100 5G phone doesn't recognize the SIM CARD despite it being in slot # 1. I have reversed the card - maybe I put in the wrong way but, it still doesn't recognize it. At present time, if I put in my old SIM card it recognizes that one. (My old SIM card sits in my tablet at present.)

Do I need to wait a certain amount of time before the new sim takes effect? I maintained the same cellphone number.  

[CSA_PM]

Please use this link to the Public Mobile Chat Bot which will direct you to creating a trackable ticket.

https://widget.telus.tiia.ai/publicmobile/publicmobile.html?lang=en 

A Customer Service Agent will reply to your community inbox here:

https://productioncommunity.publicmobile.ca/t5/notes/privatenotespage 

During business hours (9 AM-10 PM EST) you can expect a response within 30 minutes, but it may be longer depending on current volumes.

[Japonica]

how can I submit a ticket to reinstate my old SIM card

[will13am]

@Japonica , if your old SIM card is still being recognized by a device, then it is probably still the active card for your account.  If you successfully change a SIM card, the change is immediate.  If the old SIM is still working perhaps it is not defective.  It could be the device has a defective SIM reader.