Nokia 2730 900mhz not working
 

Hello all, Got nokia 2700c from customer with no network found.when i opened the phone , found that RF ic was short n burnt. Replaced RF ic with nokia 6300 RF. all 1800 mhz networks and 3g networks works well but 900 mhz not working.

masters pls help me and give solution.

change 900mhz filtre

where is it? can u show me in picture?