Hey @chasmoran,
Welcome to the community and thanks for your post about your mobile issues.
I'm sorry that it has taken so long to get back to you on this post.
Please could you try the below to try and help solve this.
On Huawei P smart
1.From the home screen tap Settings.
2.Tap Wireless & networks.
3.Tap Mobile network.
4.Tap Carrier.
5.Tap Automatic.
6.Tap OK.
7.Tap the network you'd like to connect to.
Steps complete
And on the Motorola G7 power
1.From the home screen swipe from the bottom of the screen.
2.Tap Settings.
3.Tap More.
4.Tap Mobile networks.
5.Tap Network operators.
6.Tap your network.
Steps complete
Please try this and let me know if this helps to resolve your issues.
Regards
Steven_L