Network providers

The Cellular Providers that you listed are simply those VMNO Operators that are available in your country/region.

Cellular service can be simply activated on-demand from the iPad - using nothing more than a credit card. These MVNO Operators generally provide short term contract-free service, ideal when travelling.

If it makes you any happier, here is the list of MVNO Operators that are visible from my own iPad - and no, I have not yet had need to activate service from any of them.

As noted by others, these Cellular plans are entirely independent from - and have absolutely no connection with - any iPhone that you may (or may not) have.

Lj9189 wrote:

Thank you that makes it a little easier for me to understand. The reason I was asking about it regarding other phone or other phones numbers is because his iPhone and iPad run off the same Apple ID and wondered if they're linked type thing?

You're very welcome.

An iPad, whether a Cellular model or not, is not capable of directly accessing Cellular Voice or SMS/MMS Messaging features. An iPad with either WiFi or Cellular connectivity alone can only access IP-data services. If you have added a DataSIM or activated the built-in eSIM for Cellular service on a WiFi+Cellular model of iPad, the number associated with the DataSIM/eSIM only identifies the account for billing purposes. This number cannot be used for making calls or sending messages.

When paired with an iPhone, the capabilities of iPad broaden to include access to Cellular Voice and Messaging services of the associated iPhone - relayed to the iPad over WiFi using Apple’s continuity features.

More information about Continuity and the relevant Cellular services can be found here:

Continuity

Use Continuity to connect your Mac, iPhone, iPad, iPod touch and Apple Watch – Apple Support

SMS/MMS Messaging

How to forward SMS/MMS text messages from your iPhone to your iPad, iPod touch or Mac - Apple Support

Apple ID and mobile phone numbers have no connection. An iPad can make phone calls, but only using an iPhone that has the same caller ID, and with “Calls on other devices” enabled in Settings/Phone. An iPad with a cellular connection can only use the connection for data, not for calling.

Honestly, what we tell you is not going to matter. You don't trust your partner to the point where you're accusing them of lying and are spying on them. You need to deal with whatever issues you have with them directly. Getting "evidence" will not make you feel any better.

Lj9189 wrote:

So recently I've Accused my partner of having another phone and swear he doesn't I went on to his iPad and when I click onto mobile data it comes up with :

SELECT NETWORK PROVIDER

GigSky

RedteaGo

Truphone

what does this mean? I know they are ESIM company I've looked that much up but does that mean he's had accounts or still has accounts from these companies and possibly other phone numbers???

I've looked into AppStore purchases and none of these apps are downloaded

Accounts on a cellular-enabled iPad have nothing to do with iPhones.