Is anyone able to use the Google "Voice search" feature on their phone? It only works for me when I'm connected to Wifi. Otherwise it says "Connection problem" and prompts me to try again. All other data services on the phone, including Google ones (Mail, Youtube) and Google text searches, work fine. There are very many threads about voice search problems on different forums. I'm trying to figure out whether this is due to the phone, Android version or network (Vodafone UK).