in theory 4G LTE modem is faster than 3G DC-HSPA+ 42Mbps modem due to LTE modem have newer better chipset

if u sign the RM49 modem packages, u are not entitle to 7 day money back guarantee,

meaning if u found out that service/speed is not good in your area, u are stuck with the the contract until it finish,.. or u have to pay penalty to cancel the contract due to 7 day cooling period money back guarantee not apply to this plan

RM49 packages come with 4G LTE USB modem while RM149 pakcages come with 4G LTE MIFI,. so both is different device,..
while the modem upgrade option in websites is 3G USB modem and 3G Mifi,..( which is not worth and outdated compare with LTE 4G device RM49/149 packages )

in my opinion, you should purchase prepaid u mobile sim pack from any 7-11 in your area and use the credit inside to purchase 1 day broadband to test kaw kaw in your desire usages area first before u go ahead commit the contract,..

yup the 20gb plan still available, ur 6mbps speed is 3g or 4g speed? i tested umobile 4g speed with my e398 at subang jaya with steady high speed 40mbps -60mbps, but it depends area too since subang jaya is not a congested area for umobile broadband users. not insulting but honestly i not dare to try P1, yes4g is very steady IF (and usually will) is under coverage, suitable for online gaming especially DOTA, last time i can't play dota with umobile broadband coz of the high ping, but yes4g work flawlessly, but too bad yes4g is expensive for higher data, 5gb data i think more or less for ALL TELCO, unless u buying discounted prepaid broadband from me 
morning morning cucuk my back ah ? no wonder keep sneezing, i move back to jinjang new shop already, come visit and i treat kopi 

now selling cheap high end phones and original charger, support support ya

u can try e398, this modem is not bad, u can look for blacktubi , i bought it from him