I have been running a TD-W8960N_V3, Have been running it flawlessly since 2013, But since the last couple of months, the thing has been acting up, I am with telecom/spark which has never been a great service provider, specially the region I am in(semi rural). I think its the modem though, its dropping every few mins and sometimes connection remains while dropping under a lot of downloading load.

Any solutions or what would be a positive upgrade?