i'm in singapore, desperately tried all the firmware i could found, the best attempt i could get is 30 seconds of normal connection, that's the latest firmware 1.22b05, for the older firmwares, whether it doesn't connect at all ,or it just drop connection after 30 seconds.
when could dlink release a working firmware , ahahha
tried starhub huawei e180 , connection dropped after 30 sec for the latest firmware, some others doesn't connect at all
and m1 zte k3715 , doesn't connect at all on any of the firmware
the only reported working usb modem is huawei e220 and some others ( might be )...