Todd Allcock <elecconnec@AmericaOnLine.com> amazed us all with the
following in news:fvrcfa$qnv$1@aioe.org:

> At 06 May 2008 21:41:39 -0500 The Bob wrote:
>
>> > If T-Mo instead forgoes trying to integrate them, but instead
>> > leaves them be for the near-to-mid term, and holds off integrating
>> > until they can choose a single 4G upgrade path for both networks,
>> > (like LTE) they might pull it off.
>> >
>>
>> Hmmmm- trying to manage a customer base using two different
>> technologies.
>
>> Where I have heard that one before? :-)
>
> I never said it'd be easy! ;-) Seriously, though, Cingular managed
> ok back when they were TDMA east of the Rockies and GSM to the west,
> so it can be done, apparently...
>
>

True, but that was because they were originally TDMA everywhere and did an
overlay with GSM starting on the east coast.

But your post gave me an interesting thought. ATT Wireless, Verizon,
Cingular, T-Mobile and Alltel all ran dual technologies at some point in
their lifetime while going from analog to digital platforms. The only two
major carriers to not have any experience running two technologies at the
same time? That would be Sprint (digital from day one) and Nextel (always
iDen). Maybe that explains the integration problems.