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Hi @Dilshan89
From a bit of googling it seems that the Belong 4353 is locked to Belong, and can't be used with other providers. You could try contacting Belong to confirm.
Regards,
Karl
hello<
how to unlock 4353 do you have frimware unlock for us share ?
regards
Hi @paliz1980, you need to contact Belong to check if your modem is locked and can't be used with different ISP.