Hi guys, i'm not sure whether i post it at the correct section, please move it to the correct section if i have posted wrongly. Thanks.

Back to the topic, I'm hv been using cool uni pack 4MB for almost one year, it was very smooth in terms of surfing, buffering youtube and dowloading, until shit happened when my previous modem had spoiled stroke by lightning. I called up the TM technician,they came and change the new modem for FOC. At first i was very happy becos they gave me D-link which is reputable brand compare to the previous model (i forgot what is the previous modem brand). Since then my line become unstable, slow surfing, web browser keep pop the "timed out" message, i barely can buffer youtube sometime even i'm using it alone. Now i'm suspecting the modem given by TM have been configured or something as i dun familiar with networking thingy. So anyone can i know what is problem? Or anyone else facing the same problem as i do? Any solutions besides change a new modem?