Sim not working

[Dai1]

My father just brought up that his data was not working. I was able to duplicate the issue by moving his sim card to an old phone. I've also had him restart his device. He did seem to still get the 2FA code, so text seems to work.

His plan has under 900MB used out of 40GB this cycle. Plus he has the large GB bonus from being switched to the new rewards plan. 

Any troubleshooting recommendations?

I am considering buying him a new SIM card or figuring out if I could get an eSIM card for my plan and using my SIM card in his phone instead. I don't know how to switch to eSIM though. My phone is eSIM compatible, his is not.

[Dai1]

Resetting the APN seems to have worked. I didn't even know of this troubleshooting step. Thanks.

[softech · Accepted solution]

@Dai1 since only data does not work, it would not be sim card problem

and the data worked before?? 

it likely an APN problem, start with Reset all networks and see if it works 

if not, manually update the APN.  Compare the APN settings below, try to update it and save:

APN: sp.mb.com
Proxy:
Port:
Username: <blank>
Password: <blank>
Server:
MMSC: http://aliasredirect.net/proxy/mb/mmsc
MMS Proxy: mmscproxy.mobility.ca
MMS Port: 8799
MCC: 302
MNC: 220
Authentication Type: Not Set
APN Type: default,supl,mms
         or    default,mms,agps,supl,fota,hipri
           (might need to include DUN for hotspot, please note case sensitive)
APN protocol: IPv4
APN roaming protocol: IPv4
APN enable/disable: APN enabled
                or  Turn APN on/off APN turned on
Bearer: Unspecified
MVNO (Mobile virtual network operator) type: GID
MVNO (Mobile virtual network operator)value: 4D

[Dai1]

I just confirmed voice works fine, along with text. Data is not working at all.

[Dai1]

I believe his is the Huawei P30 Pro and my old device is the Xiaomi Redmi A11

[softech]

@Dai1 so, the data  didn't work on another old phone as well?? but voice works?? what model of phone is that??