In the area where I lived, I used to get 1-2Mbps downloadspeed with marginal signal strength
(RSSI between -95 to -105 dBm). Despite there are a few nearby tower and cells. I wanted to
upgrade to Huawei E372 modem and hopefully improve my signal with panel antenna.

Instead, blacktubi recommended me to consider Huawei E398 modem (2G/3G/DC-HSPA+/LTE) instead.
Service is great, arrived the following day. I am able to double my download speed between
3-4 mbps (thanks to DC-HSPA+). Signal strength improved marginally by 2 dB. 
I am using MDMA and MWconn connect manager interchangeably.

The panel antenna arrived after 4 days. I mount outdoor facing the towers direction.
To my surprise, my received signal is gained by -10 dB. (RSSI between -83 to -85 dBM).
And my download speed can sustain between 6-8Mbps.
Now I can stream HD video from youtube (720p or 1080p) smoothly. :-) 

I am satisfied with the money invested. Hope Maxis will expand LTE to my area and support
Multi-SIM on legacy plan soon.

Next I am looking to invest on TP-MR3420 router and cooling fan for E398.

Definate thumbs up for blacktubi.