so far using U prepaid RM28 package. Something i like to share out.
1. Sim will auto connect to UMOBILE3G network
location USJ 21
average speedtest : DL 1 to 1.3Mbps , UL 0.4Mbps

2. I'm trying to network search, got UMOBILE3G, UMOBILE2G, CELCOM, with others like MY Maxis available
when i try to select UMOBILE2G, it say " your sim card does not allow a connection to this network"
So when i select CELCOM, it successful registered. Then i can see the home screen got R at signal bar. ( mean network roaming? )

I try to make a voice call - mins deducted from the credit.
sms - should be no problem.

So the summary is : can use CELCOM to make voice call, sms, internet ( data ) failed. ( edited )

So the last question is, U mobile still not able to allow us to see how many data balance from our monthly quota.
even i try to login web portal : http://www.u.com.my/index.php?q=login&acce...online-selfcare
it only show credit balance, and expiry date, not able to see data usage.
Same as *118#, not able to view data usage.

and, amazing that now using 012 ( MNP from hotlink ), using U sim card, but connected to CELCOM network.