What steps are needed to unlock a Sprint iPhone 4 to work..

You can't unlock a Sprint iPhone 4 to work on a GSM network.

 

Where would you put the sim card?

 

Why does this question get asked every day yet nobody knows that it's not going to happen?

 

I don't even think a sprint iphone 4 exists. Sprint only had the 4S and iphone 5.
And even if it did it would be a CDMA iphone without a sim tray.
Where do you plan on sticking the sim card?

 

Sprint has an iPhone 4. It's only comes in the 8GB model.

 

Sprint can not be unlocked. Verizon can now, which is pretty new.

 

Good catch, thank you

Verizon iphone 4 cannot be unlocked either.
Look at the title of the thread.
Not an iphone 5.

 

open the phone, find the antenna, remove it, replace with antenna from gsm enabled , phone, and reflash the baseband. If you dont have gsm antenna, remove cdma antenna, and reprogram the signal to accept gsm, it can be done, as there are grey market businesses, that are buying cdma phones, shipping them to china, and 3rd party factories are doing this exact thing.

 

1. sell sprint iphone 4
2. buy tmobile iphone 5...voila you can use prepaid tmo

 

You could use it on Ting which is a Sprint MVNO.

 

What steps are needed to unlock a Sprint iPhone 4 to work..

Well it hurts you my friend, but sprint phones can’t be unlock just because they don’t have IMEI number.