Go to your cell phone provider and ask them.
In order to have a cell phone, that does what you want, you need a data plan. To go on the internet and to be used like an iPhone.
And in order to have a phone that is like an iPhone... you need to then buy her an appropriate phone which then can be used, that way.
A basic phone, is not for that purpose.
OR... what many parents I know do is:
Their kid has a basic phone, to use per their rules. It is a "Go" phone.
THEN... for their kid to also be able to play apps and games and download things, their kid ALSO has an iTouch.
That way, you do not have to have a cell phone data plan and pay more for your cell phone plan.
And then, because their kid has a basic phone, and then a separate iTouch to use, their kids' phone use, is more controlled and appropriate etc.
Also, many parents I know do not want to get their kid an iPhone type phone because it is more expensive to add it to your existing phone plan, and also because, they don't want their kid to have those things on their phone. Many kids I know who have iPhone type phones... their parents don't even know what their kid does on it nor what kind of accounts/social media they signed up for.
If you just want your child to be able to download apps and play apps/games... then just get her an iTouch.
And keep her phone as a basic "go" phone.
Or you just have to buy your kid an iPhone or Android and be willing to pay more for a data plan, and then your kid can do both, on it.
My daughter has an AT&T "Go" phone.
A basic phone.
She is in middle school. There is no way she needs an iPhone like cell phone.
Then, she also has an iTouch... to use at home... to play apps etc. and do texting with her friends who also have an iTouch. But my daughter can only use her iTouch, at home... with our Wifi, which is set up to use on our home network.
And her iTouch, was one which was a hand me down, from my Husband. Then, recently my daughter got the new iTouch model. BUT she paid for it herself, saving her money.
And using it is per our rules.