If I put my iPhone 4S sim card in an iPhone 5 will it work fine?

If I put my iPhone 4S sim card in an iPhone 5 will it work fine?

Added (1). Is there any possible way I would be allowed to trade in my micro sim and get a nano sim?

You won't be able to. 4S takes MicroSim, 5 takes NanoSim.

The iPhone 5 uses the micro SIM card, so your iPhone 4S SIM card can't even fit.

You can't. The new iPhone is going to have a nano SIM card

From your question I guess all you have seen it the announcement on 12/09/2012 and nothing else

So yes it will work fine for Apple and you are second places

Networks will provide free of charge the sim/ micro / nano needed to use your phone
It will not be available sim free or PAYG from any network [just contract] for many months,
You will have to buy it from Apple, co.uk or their many store directs
iPhone5 prices are £529 / £599 / £699 for 16Gb / 32Gb / 64Gb

And assuming you have the IP5 walking in tMobile shop contract detail are transferred from micro tr nano sim ( take minutes queueing longer) Just deactivate micro sim activate nano sim

£200.00 is approx the amount YOU will have to pay as you will NOT get the now reduced price for the new IP4S handset and will have to pay £529.00 for the 16GB IP5.

So whatever your IP4S contract is add £8.34 as that is the effective amount your contract increases by if £200.00 is spread out over 24 months

This is really gonna hurt…
Intro
The multi award winning smartphone in 2011 is (was) the Samsung Galaxy S2 I9100. No other phone including the IP4S has won more awards even USAIN! PENDLETON, HOY, WIGGINS.

The iPhone4S was NOT the best DUAL CORE phone, the IP5 is yet another DUAL CORE phone by the same maker.

The IP5 is IMO the IP4GS [ IP4S PLUS 4G the LTE] and Simultaneous HD video and image recording which is already on at least 3 other phones

Here they are side by side the '4GS' and 4S you should note the size has increased ALSO THINNER but the weight has decreased exactly 20%! So is it durable?
Increase in size decrease in weight (5 iPhones so far all approx same size average 136gm, now 112g from IP4S 140gm, -28gm 20%)

http://www.gsmarena.com/...hone2=4212

The price paid or tariffs commanded (no demanded) by iPhones… On any every network defy logic and gravity

recap***

TWO new features are on iPhone5 NOT on the iPhone4S
i) LTE
ii)Simultaneous HD video and image recording
and if you include the A6 chip to make things go a bit faster*** THREE NEW FEATURES.

And BTW it was JUST 4 things again that took the iPhone4 to an iPhone4S
Dual Core / Siri / World phone (both CDMA & GSM) / and that A5 chip

This does not merit the huge price differential between the IP4GS (o.k IP5) and the IP4S

This I really do find funny

If you've got any existing iPhone accessories you want to keep using with the new iPhone 5, which has a smaller charger port, Apple is selling an adaptor. This Lightning to 30-pin adaptor costs £25… Apple is selling an adaptor NOT PROVIDING?

What can an Iphone 5 do that other phones can't do?
Take your money quicker

Sorry, just the messenger