531b

I recently shifted to a bigger house, and I do not get sufficient signal strength in other rooms, is it time to get a new router? My current one is ZTE ZXDSL 531B, which was given by BSNL and is more than 5 years old. Should I get a more powerful router? If yes, please suggest some

can someone help me out too ? i have these two wireless modem router my BSNL connection is connected with ZTE ZXDSL 531B and another extra wireless modem router i have is Huawei MT841 , i am using 531B at my home but in some area in my home the network doesent reaches , so i want to...