Mobile device cellular provider

I'm trying to register our players with an sms service utilized by our game server and I'm pulling my hair out trying to search for this (either it's very obvious and I'm missing it or it isn't readily available).

Is there a way to get a user's cellular provider for their mobile device? (i.e. Verizon, Sprint, etc.) I can't seem to find any information for iOS or Android on the topic. I know in Obj. C and Swift it's fairly easy to get this information, if I can avoid writing a plugin that would be ideal. I'll bite the bullet if I have to.

Thanks in advance.