Once your Sprint phone is unlocked, it will work exactly like factory unlocked iPhone. You will be able to use your device on every iOS firmware. Even future Apple updates will work without any hiccup. No hardware os software change will be required from you. Only IMEI number will be needed.
How to Unlock Sprint iPhone 6S, 6S Plus, 6 and 6 Plus
Step 1: If you know network of your device, you can go to next step. Otherwise, you can use our cheaply priced IMEI checker service to know exact network of your phone.
Step 2: Add item to your cart by using “Add to cart” button. “+” or “-” sign can be used to add or remove multiple items from cart.
Step 3: Once product is added, you can view you cart. If you got any discount coupon, you can apply it. Update the cart if any changes are needed or simply proceed to checkout page.
Step 4: Enter your name, country, IMEI and other billing info on checkout page. If you have more than 1 IMEI number, you can add them to notes section.
Step 5: After details have been entered, agree to terms and conditions and place order. You will be redirected to Paypal page where you can make payment either from Paypal or via credit card.
Step 6: After making payment, you will get receipt of order on mail. Now all you will need to do is sit tight for few days and within few days, you will get an Email with congratulations message that your Sprint iPhone has been unlocked.
Step 7: After receiving Email, just insert non-Sprint sim card with Wifi on and you should see signals on your phone. If that doesn’t work, you can try resetting network settings or simply connect to iTunes and do a back and restore to complete Sprint iPhone unlock process.