Which network do BT Mobile use to carry service?

Just thought I'd ask if anyone knows of a comparison table/breakdown of the
different UK networks and their charges for these numbers:
0800
0844

As header

Is there a phone, or a java app, which allows you to type in an SMS, press
send, then rather than come back with sending failed due to no network
coverage, will wait for network coverageand send the message.
I enjoy hill walking and car parks are often in places with no network,

Just bought a Moto SLVR L7 and have two questions which I cannot resolve by
RTFM and Google etc etc!
Firstly, should it be shipped with a MiniSD card, or is this an "optional"
extra?

T-MOBILE states in their Web n Walk page :
"Use of Voice over Internet Protocol and Messaging over Internet Protocol is
prohibited by T-Mobile"
Can someone help me on the following questions :

This is the only full featured software that works on your A1000 and
utilises the full potential of it's large screen, touch screen display
PDA capability.
In addition to the software, You will require;

Who is considered to be the best provider at present please? I
appreciate it depends on where one lives etc. but generally based on
reception, support etc.

It's been asked in a reader letter to the New Scientist and I haven't
seen the answer yet: has anyone noticed, about 1 second before you're
receiving a mobile call, it will cause a little flicker on a CRT next
to the phone? I've noticed it on my PC monitors, and the reader

Have 2 PAYG sims, one is my main sim and the other I want to let die,
however the latter has quite a bit of credit on it. Both are Vodafone, is
it possible for Voda to transfer the credit from the one im to the other?.
TIA

Im going to Greece in a week and wondered what network offers the best
prepay tariff for abroad (i.e. receiving/making calls & txts)
Anyone have any ideas?
Thanks

When compared to K750i

Any opinions on this handset? Not really too bothered about the MP3
features (although they are OK to have), but how does it come across as
an alternative to, say, a Nokia or SonyEricsson interface? Is the
battery any good? Does it have any dodgy design flaws that people here

we're trying to configure a Vodafone 3G GPRS Datacard Quad  in a
windows XP laptop.
Folowed through the installation (twice) and can happily connect to the
Internet, get an IP address, DNS servers etc.

Thinking of getting the Nokia N80 but not sure what the wifi connection is
like, does it hold the signal well and is it reliable?
Thanks