A:Answer This particular model sold here is unlocked, and it is certified for Verizon LTE network, so it is compatible if your SIM card is for use on Verizon network. Straight Talk is an MVNO, so it shouldn't have any restriction. You can check your IMEI of the device at: https://www.verizon.com/onedp/byod#/ to see if it is Verizon compatible. If your IMEI is not compatible on Verizon network, it is likely that it hasn't been uploaded or that the device was not registered for Verizon or not intended for Verizon network. When this happen, simply check with the manufacturer for verification. There are similar variances sold worldwide that look almost the same.