speaker phone mic and iphone mic confusion

when using speakerphone speak into the round mic at the top of the handset near the headphone socket, when speaking normally with handset heal against ear obviously speak as normal into the mic at the bottom of the phone, obviously if you want to use the handset in speakerphone mode on a table people may not be able to hear you very well, but speaking into the mic near the headphone socket will help people hear you on a busy street, or when they claim your very quiet.

tesco mobile iphone 4 set max ring time

punch the code below into your handset using the dial keypad and then press dial.

**61*905*11*30#

it will say some guff about setting registration and voicemail which should mean you now get 30 secs worth of ringing, before going to answerphone. the number before the last # is the number of time in seconds the phone will ring for, 30 being the supposed maximum ? I haven’t tried it higher or test timed beyond 30 secs perhaps you could feedback on this ?

( i dont think this is handset specific but it is I beleive network specific so try it out at your own risk )