I had the same problems for my LG Optimus 7, when it was first launched. I do not know how many times i had to call Singtel to sort the issue out. i was told at least on 2 occasions my package was not registered and they had to do it for me. It didnt work even after they told me to wait for 24-48hrs.
Multiple times they told me their technical staff would contact me. None did. One day, i tried the Xplorer and it finally worked. Couple days later, i recieved an sms from singtel to say they were still working on my issue. They didnt even call me to find out if it was working. Subsequently, about a week after that they called. Straight away i told them it was working.
I find the Xplorer lags tremendously. It also hangs when i zoom in to the maximum and after that i am not able to zoom out. I need to go back to the Home Page. Also frustrating it does not multitask. If for any reason you need to reply to an sms and you leave the Xplorer screen, it need to reload again. Start all from fresh.
I have been trying to find out to whom i could write to about all this issue. No luck. telmap site can never be loaded. So not sure what is the problem or even of their existence. I would not want to waste my time contacting Singtel, cos as a customer, i probably would be made waiting again.
I wonder if this problem is only for the WP7 OS. For other platforms such as the Iphone and Android do they phase similar problems. I think Singtel should provide us some form of means to provide feedback on the Apps they are releasing. of cos we want to see it working well. Soliciting our feedback would help them improve this app.