I can't get my USA roaming to work. It is in my account. I have tried restarting my phone, roaming i

[Mahali]

I will try all you have suggested. Thanks

[Mahali]

Thanks. My roaming has been on. Will try to manually connect

[Handy1]

@Mahali  First ensure you got correct US add on and not long distance add on . And make sure phone set to 4G/LTE and connect to T mobile or AT&T . If still issue with voice set for to 2G and connect only to T mobile . And turn data roaming on in phone settings if you got the US roaming data also 

[BKNS27]

@Mahali 

You will need to enable Data Roaming and manually connect to AT&T or T-Mobile network for the US Roaming to work.

[softech]

@Mahali 

Critical part to US roaming depends on T-Mobile/AT&T coverage and whether you can connect successfully onto either network.

If the phone is not connecting to T-Mobile/AT&T, change the Network Connection from Automatic to Manual and select and test both T-Mobile and AT&T and see which one you can connect.

If your issue is with data, make sure your Roaming Mobile data is enabled and you have disabled your mobile data limiter.  Also change your network mode to 4G (and don't try 5G until you can connect and works on 4G)

If your issue is with voice, make sure VoLTE is enabled on the device setting.  And if it does not work, try to change the Network to T-Mobile ONLY, and change  Preferred Network Type or Network Mode to 2G and see if the calls go through.
Also, you can download VoIP app TextNow as a workaround to make calls and text if you have Wifi or if your roaming has data component and data  is working