My backlight died a few weeks ago and received my replacement device. All is fine except when I go grocery shopping (at Meijer- a multistate chain retailer like Walmart). The other day I was in the store for a few minutes and my phone tells me that I don't have a sim/service and need to activate. I cannot do anything until I complete the process. Last night it happened again, except a total of 4 times. It hasn't happened anywhere else. How do I fix this?
