My One S seems to occasionally have a few connectivity issues with 3G, I am not sure they are related to the signal issues already discussed in other threads in this forum. I have an international handset, MAO black version (has two tiny chips too, but not worth complaining about), running stock firmware, haven't done the dev unlock yet.
1) Sometimes the phone shows 'No Service', but I still have a working data connection and can make calls. Sending/receiving SMS appears not to work for some reason though. Can work around by switching into and out of airplane mode. Until I do that any SMS I compose under these conditions just pends, after the workaround they do get sent after a few minutes.
2) Sometimes something seems to go wrong with the 3G data connection, all the internet apps suddenly say they have no connection, alogcat says that DNS lookup is repeatedly failing even though I have a strong signal and 3G/HSPA connection (also tried connecting to IP addresses directly, doesn't work either). Tried getting online via Wi-Fi and it works, but all the Internet connectivity fails if I turn Wi-Fi off. If I reboot the phone it is able to get online again.
I brought this problem up in a live chat with HTC customer support and they have advised me to arrange for them to collect the phone for repair, the shop from whom I bought the phone advised the same. Just thought I would share it here and find out if it is common, or it is likely, as HTC think, there's something wrong with my phone's antennae. (My thought is that both could also be software problems)
Anyone else experience problems like this?