Yes, you can. As long as the iPhone 4S you are looking to put on the Straight Talk network is "unlocked" and thus free to access another carrier's service.
Once you're sure that your phone is unlocked, you just need to purchase a Straight Talk SIM card, and then activate. See the link below to find where Straight Talk lays out this process.
It is not possible to use your Sprint iPhone 4S on Straight Talk. In order to use a Sprint iPhone on the Straight Talk network, it would need to be unlocked.
Absolutely. You need to buy the appropriate sim card and activate it online.
Yes, you can use the Samsung Galaxy S4 on Straight Talk. Check the Straight Talk site to see availability, especially if your S4 is currently tied to a traditional carrier.
yes
Straight talk or sprint
Yes, you can use a Samsung Galaxy S3 or S4 that is on AT&T or Verizon network on a Straight Talk plan. You will need to unlock the phone before switching providers.
Yes. You can use a keyboard with a Samsung galaxy 3.
You can use the clipboard on a Samsung Galaxy S3 using your S.Pen.
Yes as long as you use the straight talk sim and custom apn settings.
No the Samsung Galaxy is not nerdy. It all depends on how you use it. If you use it to do a lot of NERDY stuff then yes.
No
NET10 seems to have airtime cards where you can add minutes as needed. There's also unlimited plans available. If you mean to use the Samsung Galaxy S4 with other pay as you go plans (ex: Straight Talk), it's possible provided the phone is unlocked. You may have to speak with the pay as you go or prepaid provider to see what their policies are.
Yes. The Samsung Galaxy S3 runs Android version 4.1
FaceTime is not supported by Samsung devices. There are video conferencing apps that you can download that you can use with your Galaxy devices.
yes you can.....