Hi, can someone please help me with the network data settings?

My mum just bought a U28 postpaid plan. I have found on the internet where I will have to add APN setting to be able to use mobile data, which I did. But the speed is really slow with only 0.08 Mbps and it shows the symbol "E" instead of "H+" like my UMI 30 plan.

We were told by the promoter the speed for U28 is the same as the speed of UMI plans. Does anyone have any idea how to make the speed faster?
Thanks in advance!!