Hi. Im using Umobile broadband M128 HSPA+ plan which is theoretically capable up to 42mbps, in Senai, Johor. Signal here is acceptable.
My speedtest result : ping 80 to 200ms, DL 1-3mbps, UL ~0.5mbps with the provided ZTE 7.2 mbps USB dongle modem.

For me, the thing i am concerned is to get relatively more stable ping/ latency as i am getting the ping fluctuation while playing games (specifically Dota 2), ranging 120ms to 3000+ms, which really frustrates me a lot! (As my housing area does not have wired internet - Unifi or Streamyx service!!!)

Can you give me your recommendation (which modem with/ without antenna) which can solve my problem.
I mainly use it in home and mostly 24/7, thus I wont carry the modem around.
Budget RM 300-400

Thanks in advance.