Network not accessible.

Question

Dear Sir/Ma

Am Ajayi Foluso I work with Procter & Gamble Nigeria Ltd, I bought Samsung i607 last year during my training period in Manila and since have been enjoying the phone.

Since yestarday, the phone has not been accessing network, it is displaying "Phone off" i went to the wireless manager menu to put it on but still not suffice. kindly help me.network locks