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@allen4002, the Samsung Galaxy S4 Mini supports both 3G (HSPA) and 4G (LTE).
Hi there @allen4002
Yes it is 4G ready, which is nice isn't it . Check your model number by clicking onto this link herehttp://community.giffgaff.com/t5/Tips-Guides/Will-my-phone-work-on-4G-iPhone-5-iPad-3-Samsung-Galaxy...