Now that's odd, I have been under the impression that IMEI is not tied to any specific country, rather it contains a genetic TAC part that identifies the device and the manufacturer, and the SN part that is manufacturer-specific (usually serial number and factory information) What did they exactly say about the IMEI, how did they determine it was "Chinese IMEI"? Maybe you told them you originally had Chinese FW on it, and they took the lazy way out and told you it is not supported because they did not bother to solve the problem...?