To use your Samsung Galaxy Discover(SCH-R740C) on verizon network. you need to unlock it. You can unlock it by an network unlock code.
Here is how to get the network unlock code.
visit
https://www.unlockninja.com/
Select: Brand Name
Select: Model No and click unlock button
on the next page proceed the steps below:
1) select purchase country and network on which device is locked, your mail
id then make payment
2) We will send you login details(Username and Password) for
unlockninja.com at the same moment in your mail to update IMEI No
3) Make login and Update IMEI, we will deliver you the code in The least possible time
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