P.V. wrote:
> "Quaoar" <> kirjoitti
> viestissä:JqydnaADsKQqTQrVnZ2dnUVZ_umdnZ2d@comcast .com...
>> Jonathan L. Parker wrote:
>>> Quaoar wrote:
>>>
>>>
>>>> ...AF(A)IK, there are no sim cards in US cell phones, not even the
>>>> iPhone; it is dedicated in firmware to AT(&)T.
>>>
>>> I can't speak directly for the iPhone because I don't own one, but my
>>> AT&T branded Nokia 6102i certainly *does* have a sim card in it.
>> Thanks for that: do you know if this is universal with all ATT cell
>> phones? Does the presence of the sim card mean that if you go to
>> Europe that you can buy a sim card for whatever system you might want
>> to connect?
>
> It depends on whether you've bought the phone and paid it's full price.
> If yes, then it's most likely unlocked and accepts sim cards from any
> other (including foreign) provider as well. But if the phone was free or
> cheap, it's most likely locked to accept only cards from the provider it
> came from, and so foreign sims won't work.
>
> The phone also must support the frequencies used in the destination. The
> cheaper the phone was when bought and the longer ago the phone was
> bought, the less likely it will work in any other frequecies that are
> used in the provider's own network. Frequency bands used in Europe are
> 900 and 1800 MHz. If the specs say the phone supports those bands, or if
> the phone is said to be a quad band one (quad band means 850, 900, 1800
> and 1900 MHz), it will work in Europe.
>
> If both previous requirements are met, you can use a European sim card
> in your American phone. (Typically non-residents can only get prepaid
> sims.)
>
>> The iPhone has no user access, even to change the battery, so no sim
>> card replacement can be done (since it does not have one).
>
> See for yourself, iPhone User Guide, page 6:
> http://manuals.info.apple.com/en_US/...User_Guide.pdf . (Part
> "en_US" in the address strongly suggests that this applies for American
> iPhones.) There it says,
> ---
> If your SIM card was not preinstalled, you must install the SIM card
> before you can use iPhone.
> Installing the SIM card:
> 1 Insert the end of the SIM eject tool into the hole on the SIM tray.
> Press firmly and push it straight in until the tray pops out. If you don't
> have a SIM eject tool, you can use the end of a paper clip.
> 2 Pull out the SIM tray and place the SIM card in the tray.
> The angled corner of the SIM ensures that the card fits only the correct
> way in the tray.
> 3 With the tray aligned as shown, carefully replace the SIM tray
> containing the SIM card in iPhone.
> ---
>
> P.V.
>
>
Just to clarify the issue, since I both have experience of US phones and
of the Finnish system.
Many years ago, US phones had built-in connection systems that did not
require a SIM card and which could only be used on a given network.
The development of GSM in Europe, first ignored in the US, beginning to
make inroads there, some companies like ATT started offering GSM phone,
while keeping the traditional phones. Today, several US companies offer
GSM service, but not all, AFAIK.
If you request a GSM phone from companies offering the service, the one
you will get will be locked to SIM cards provided by that company. The
explanation is simple, the cost of the phone is subsided by the
subscription you are required to subscribe. No free lunch here, just a
financing device.
Those phone, for most of them, can be unlocked provided you know where
to look on the Internet, and if a cost is involved, it is of nearly
$5.00. After such an unlocking, you can insert any SIM card you want.
This kind of operation, needless to say, is seldom economically viable
until you reach the term of your subscription ... or upgrade your phone
if you get an interesting offer from your provider.
In Europe, the situation varies. Until some time ago, in Finland,
packaging a phone with a subscription was illegal. So basically, you
could buy the phone you wanted and insert the SIM provided by the
provider of your choice. This changed fairly recently, and now, as in
France, you can either buy your phone no strings attached and then
subscribe as you like, or buy a package, as in the US.
In the US as in Europe, you can also buy some attachement (which can be
built-in in some laptops, I believe) that allows you to connect as if
you were using a GSM phone. The advantage is, this frees up your phone.
The downside is, you have to pay for an additional subscription. I am
not sure this is a good deal for most people.
A last note: while I travel in Finland, I just connect my phone by cable
(more reliabe than Bluetooth) to my laptop and I can surf as long as I
want. People connect online almost everywhere. Of course, if most areas
of Finland are covered by 3G now, speed can vary as another poster
indicated. This for under $30 per month.
Regards
--
John Doue