Can I use my iphone 4 sim in my current ipad 3G

[seb1987]

I have two contracts and my 3 sim is unlimited data can I put that in my ipad?

 

[wrkactjob]

Try.

 

[Gav2k]

I have two contracts and my 3 sim is unlimited data can I put that in my ipad?

No! 3 will detect it and its a brech of your contract.

 

[seb1987]

Is that for certain?

 

[edjs]

It's best to check with your carrier before-hand. They do see what device the SIM is inserted into, and may, if the device changes, automatically not include its usage in your current plan and charge you their 'plan-less' rates.