Will the Neo1973 support Dual-SIM with SPST? Re: Using UART/SPI... for swithing 2-8 SIM-cards Re: [Neo1973] Hardware access: additional solder points ; )

[Thomas MARCHESSEAU]

Hi all,

did you check www.simore.ch  ?
its a great system to put 2 sim card in one slot.
i got one, it works fine (*) on most of standard handset but not very 
well  my wistron ( a linux phone )  i must reboot to change number.

(*)unfortunatly,  you cant use 2 numbers at the same time, because 
there's only one GSM recept/transmit chip ( 
http://www.simore.ch/en/faq.php#2 )
but you can setup the phone to switch from one number to the other in 2 
clicks without switching off your Mobile

cheers,
Thomas



Robert Michel wrote:
> Salve Gabriel, *!
>
> Gabriel Ambuehl schrieb am Sonntag, den 19. November 2006 um 16:56h:
>
>   
>> On Sunday 19 November 2006 16:36, Robert Michel wrote:
>>     
>>> One of the potential would be a software controlled switching of
>>> different SIM-cards. AFAIK "Benefon Twin Dual SIM" was the first
>>> phone that allows the user to switch between two SIM-cards with
>>> the phone GUI.
>>>       
>> Pushing this further, I'd LOVE to see a phone that can use two SIM cards at 
>> the SAME time (so I can have two numbers which would be useful for anyone who 
>> has both business and private mobile numbers or got screwed with a bad tariff 
>> and can't transfer his number right now...). 
>>
>> I doubt this is possible but still one can dream ;)
>>     
>
> Technicaly it would be no problem but the question would be if
> this device will populare enough to be a mass market product.
> I could imagine a (open linux) smartphone with a CF-II port and 
> a CF-II GSM/GPRS or GSM/UMTS card to buid this - e.g.:
> http://www.expansys.com/p.aspx?i=140979&stack=technical&action=open 
>
> First I thought that just one number and a PBX like asterisk on the mobile,
> would solve your problem:
> with  different profiles and forwarding private calls during worktime
> to the mailbox "Hello $callername I'm at work and I will hear
> your message until $calender.break.next - when it realy can't
> wait press 9 - or leave now your message after the beeep"
>
> But when the phone is off - both - business and private would go
> to the same network mailbox.
> And second the phone cost will be mixed on the same bill - but
> for this, a Dual-SIM could help you ;)
>
> When you are screwed by a bad tariff you could just switch a network
> mailbox on "I'm sorry, I have a new number..."
>
>
> For my friends I prefer to give them a PSTN (voip) number cheaper for them to
> call me and forward it to my mobile with asterisk. With a the Neo1973
> asterisk will be able to inform me via GPRS (in the background) who is calling.
> And asterisk could be used for call backs so for your monthly billing of your
> mobile would be only business calls.
>
> But I have a reason to add, why such a dual mobile would be nice:
> Using GPRS with a different SIM then the phone calls.
>
>
>
>
> BACK to the near future and let us think what would be possible to
> do with the Neo1973:
>
> ################################################
> #Will the Neo1973 support "dual-SIM" with SPST?#
> ################################################
>
> This allows to use 2 SIM and switch with the most mobiles on the market
> - you need only an adapter like:    www.dual-sim.com/
>
> This pdf explains the ciruit
>   
>> http://www.novotechdistribution.com/productinfo/sonyericsson/GSM_GPRS/GM48-47/Application
>> Note - Dual SIM connection.pdf 
>>     
> and the secret is a signal line "Hi=SIM1, Low=SIM2" and an analog
> multiplexer NLAS325 (given example by sonyericsson)
>
>    "The NLAS325 is a dual SPST (Single Pole, Single Throw) switch"
>    http://www.onsemi.com/pub/Collateral/NLAS325-D.PDF  
>    
> So when the Neo1973 GSM Hardware and driver support SPST switching,
> we could programm the switching in dependences of time and localisation
> and no hardwarehacking would be neccessery, just to by such an adapter
> for 10€.
>
> Further hacking - with the signalisation of Hi and Low and a free
> access to programm it would it also possible to build a small circuit
> for _4_ (6 or 8) SIM cards - HIGH and LOW would be used for signaling :))
> And no I/O solderpoint would be used/blocked/wasted for such a muti-card
> switching :))
>
>
> So it would be great, when the phone GSM software and hardware would
> support DUAL-SIM ;)
> And Sean, please remember that free (just one) PIC (or/and I2C)
> bus(es) for sensors/interfaces would be great ;)
>
> Greetings,
> rob
>
>
>
>
>
>
>
>
>
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