Not registered on network

[yoyo30]

I bought my phone yesterday and after entering a card, my phone still says not registered on network

[yoyo30]

I might just send it back

[JAMES4578]

Hi @yoyo30  There could be an issue with your Sim card or your Network.   However firstly restart your Device to see if that solves the issue.  Ensure you have the latest  software update  and turn off Wireless connections temporarily by switching on Airplane Mode for a short period and then switch it off again.  You could also try resetting the Network-General Management-Reset- Reset Network Settings.

If there is still a problem you may need to remove and  and reinsert your Sim card. otherwise contact your Network provider, you may  need the APN settings.

Some more Troubleshooting in this article  https://www.androiddata-recovery.com/blog/fix-not-registered-on-network 

[Dandy__]

Or you could try to reset all network settings

[Jameswalter]

Toggle On and Off the Airplane Mode.
Restart Your Android Phone.
Take the SIM Card Out and Put It Back In.
Update Your Android Phone's Software.
Manually Select Your Carrier.
Change the Preferred Network Type.
Reset the Network Settings.
Use a Different SIM Card.

Hope this helps.