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best buy your self a new sim2.10 simcard open the box so you can reach the simcard and before place it flash the box with the old simcard into it with bootloader #84d and an image for sim2.10(openpli4) and do not a reboot (otherwise this wiil not work) now remove the old simcard (the box still running) put the new sim2.10 into the box after that reboot the box and see the box will boot as a sim2.10 now and will work perfectly