The Real issue is the type of 'tower' you are connecting to.
I.e. LTE, CDMA, TDMA, GSM, AMPS, NMT-450, TACS, iDEN, HDSPA+ , etc..
so for example if you were roaming in an area that only had AMPS
(analog towers) and you were using a iDEN or CDMA or GSM or TDMA or
HSPA phone you would not connect. Of course some phones had
'backward compatibility' and others did not.
But that was as the size of the mobile telephone was decreasing in
size from fixed to mobile / portable size. In other words you could
actually start moving your mobile telephone from car to car 'easier'
than having to de-install it. All you had to do was unplug it from
the cigarette lighter adapter.
Then came the reduction from bag phone size to hand held Nokia styles
in the late 1990's .... to the new tablets / slabs / wrist phones of
today. But of course the issue is cost, and the amount of time one
wants to put in.
If you require communication, you typically always had to have
multiple phones to connect to the various towers and satellites.
Furthermore it is still true today, but instead of 'voice'
communications, everything is moving towards 'data' thus TELCO's are
changing the price plans and features to maximise revenue.
This of course is much different than the old plans where one had to
purchase at full price a device or depending on your carrier one could
get a 'no cost' device for a five year contract.
Then one had to pay a monthly fee for costs and fees relating to taxes
and backhaul typically 19.99 or 29.99
as well as blocks of air time on their networks and a per minute
roaming connection fee by the backhaul network if you left their
networks ... their fee was 29 cents or 59 cents or 99 cents depending
on your home LATA .... and the roaming fees depending on how many
networks you roamed to .. from $ 1 per day plus $ 1 per minute up to $
10 per day plus $ 5 per minute or charge to your card if you wanted to
... and it could get rather expensive .... of course Sat time was even
more expensive back then think multiply by 10 or 100 ....
this is still true for most satellite telephone and data networks.
Today, the big four are : Iridium, Immarsat , Thuraya , GlobalStar ;
and if you need to get one, Outfitter Satellite here in Donelson,
http://outfittersatellite.com is a reputable shop to purchase or rent
one. Their phone and address is as follows :::
Outfitter Satellite
2911 Elm Hill Pike
Nashville, TN 37214
Phone
+1-615-889-8833
Fax
+1-615-902-0028
So it really just depends on how much you want to spend ....
With Verizon/ AT+T you are going to spend around 50 to 100 to get
voice, SMS, and data plus their roaming networks plus others that can
allow Verizon / ATT to roam on. .. typically for 'free'
or go with Virtual Carrier that can roam on Verizon/ATT networks
typically Sprint /CDMA/TDMA can roam on Verizon
and T-Mobile /GSM can roam on ATT
MetroPCS/ Cellular South -CSPIRE had 'both' and depending on your
phone' you could roam on one or the other but not both...
we will have to see what happens with the T-Mobile purchase of MetroPCS
but with the new LTE ... supposedly this is supposed to 'dis-appear'
but then a new 'network' will appear and your 'phone' won't work on
that 'new' network.
of course your mileage may vary
good luck on your choice.
cheers from J =)
Justin W Elam
E-mail ::: -
justin...@gmail.com
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BT
$$