Trying to give my mom my straight talk phone with SIM it came with but it's saying "invalid sim'...I switched from a st phone

[Tamara_12]

Trying to give my mom my straight talk phone(Galaxy Grand Prime) with SIM it came with but it's saying "invalid sim'...I switched from that straighttalk phone to Verizon Galaxy S5 so they sent me a new SIM card. So now I want to activate my old phone with a new plan, her current number with her prepaid verizon account and but what can I do about the SIM in the straighttalk phone saying it's invalid?

 

[hang-the-9]

Trying to give my mom my straight talk phone(Galaxy Grand Prime) with SIM it came with but it's saying "invalid sim'...I switched from that straighttalk phone to Verizon Galaxy S5 so they sent me a new SIM card. So now I want to activate my old phone with a new plan, her current number with her prepaid verizon account and but what can I do about the SIM in the straighttalk phone saying it's invalid?

Contact Straight Talk, have them activate that SIM on the phone.