I switched to ID Mobile few days ago and since that I've been unable to receive OTP's/verification codes.

Same here…tried verifying my number but it keeps failing 

Hi ​@WicketW  and ​@Katarzyna Anna Machunik  

Sorry to hear this. We will need to raise this with our Technical Team.

We’ll shortly send you a Private Message to your Community account, so we can discuss your issue further.

To access your messages, click your profile picture in the top right hand corner and then click ‘Private Messages’.

Alternatively, if you are currently logged in, you can use the following link: https://community.idmobile.co.uk/inbox/overview 

We’ll see you there.
 

Hi ​@Katarzyna Anna Machunik & ​@WicketW 
 

Do you have an E-SIM installed? Is this a problem with an iPhone?

If so, have you tried switching off your eSIM then switching off your phone and then switching both back on?
(To disable an eSIM, navigate to your phone's settings, then find the section related to SIM cards or mobile data. Locate the eSIM you wish to disable and toggle the switch to the "off" position. This will temporarily disable the eSIM without deleting it)

And you can try the same if you have a physical SIM (info for an iPhone):-

1. Open Settings: Tap the Settings icon on your iPhone's home screen. 
2. Access Cellular or Mobile Data: Scroll down and tap either "Cellular" or "Mobile Data" (depending on your iPhone model and settings). 
3. Select the SIM: In the Cellular or Mobile Data section, you'll see a list of your SIM cards (if you have more than one). Tap on the SIM you want to turn off. 
4. Turn Off the Line: Locate the "Turn On This Line" switch and toggle it off. 
5. Confirmation: You may be asked to confirm your action. Tap "Turn Off" to proceed. 

I have seen, on the internet, that this was a solution that worked for the same problem where an E-SIM was installed but may also work with a physical SIM.

Good luck x

Same issue here, switched last week. Have tried multiple eSIM, manually setting APN

Hey there ​@mr_rnoda, we sincerely apologise for this. Three UK are aware of a network issue currently, affecting some customers from receiving OTP’s.

Three UK are working to resolve this issue ASAP for all customers affected. Our apologies for this and we hope this is back working shortly.

Thank you for your patience.

Kind regards,

Tyler

Same issue for me, I cannot received OTPs from my 2 Banks and I cannot receive order updates from Screwfix either, for info I only have a SIM card, my eSIM is turned off 

SMS and calls appear to work fine (both directions), but specifically it is short text message services I can’t use. I am using an eSIM, have tried manually setting APN config and resetting network settings. I also looked in the pixel diag menu (*#4636#*#*). I can see that the SMSC number is correct (447782000800). Pretty convinced this issue is on ID mobile side following a port of my number from giffgaff.

Try reading and clicking on the big yellow banner at the top of every page of this community!

Thanks Paul, the banner was not there at the time I made this post. You are a true hero, have a great day.