TRC says modern equipment will be used to identify the unregistered mobile phones and remove them from use.
TRC Director General Anusha Palpita has said that all imported mobile phones should be registered and they are required to meet certain safety regulations.
The TRC will block the signals to the unregistered phones, he said.
TRC has taken steps to maintain a Central Equipment Identity Register and all the phones failing to register will be disabled by blocking the International Mobile Equipment Identity (IMEI) numbers.
However, the users of unregistered mobile phones at present will be granted a grace period to get them registered, a spokesman of the TRC said.