Use MDMA to force it to UMTS 900.
Anyway, these days most of the towers are running on UMTS 2100.

Oh, I didn't know there are some E398 that are not supported by MDMA.
Only got to know after tubi's explanation.

I'm using E398 and my modem works perfectly with MDMA.
I can select my LTE band flawlessly as well.

Panel is really good if your connection sucks.

I have bought three panels from tubi and 2 are in PJ while 1 unit at hometown.

Er, it helps a lot in my PD's connection but seems like my connection is considered good in PJ, I'm not using those panels anymore. Somehow they slowed my speed when I last tried. So, 2 panels lying there and do nothing...

I have bought 3 and I'm only using one now at my hometown because my connection is quite bad there.
The 2 are collecting dusts in PJ because they always point me to the slower towers.
I think the slower towers are having strong reception.

Now on LTE, I don't need these panels anymore.

It did help earlier, pointed me to a faster tower and I was so greedy, bought another one for PD.
Then, bought E398, the greed struck again. Since it can plug in 2 antennas, I went and bought another from you.

Sooner, I noticed my speed got deteriorated. Unplugged one of them, speed flew. For many months...
Then suddenly, the speed slowed down quite a lot. At first just suspected something wrong the connection, until one fine day unplugged the antenna, and it was flying.

Now, I'm on LTE and basically it makes no difference.