SMS-STATUS REPORT

[Jack Finderman]

Hi Guys.

I already got the GSM SMS after last Decode with my KC but the status SMS is Report not Deliver as usual so I cant see the SMS.

this the result :

GSM A-I/F DTAP - CP-DATA

Protocol Discriminator: SMS messages (9)

.... 1001 = Protocol discriminator: SMS messages (0x9)

0... .... = TI flag: allocated by sender

.000 .... = TIO: 0

DTAP Short Message Service Message Type: CP-DATA (0x01)

CP-User Data

Length: 37

RPDU (not displayed)

GSM SMS TPDU (GSM 03.40) SMS-STATUS REPORT

.0.. .... = TP-UDHI: The TP UD field contains only the short message

..0. .... = TP-SRQ: SMS STATUS REPORT is the result of a SMS SUBMIT.

.... 0... = TP-LP: The message has not been forwarded and is not a spawned message

.... .1.. = TP-MMS: No more messages are waiting for the MS in this SC

.... ..10 = TP-MTI: SMS-STATUS REPORT (2)

TP-MR: 43

TP-Recipient-Address - (destination number)

TP-Service-Centre-Time-Stamp

TP-Discharge-Time

TP-Status

0... .... = Definition of bits 0-6: as follows

.000 0000 = Error: Short message transaction completed (0)

.000 0000 = Reason: Short message received by the SME (0)

can everyone kindly tell me what's wrong with that? thankyou 

[Vasil Velichkov]

Hi Jack,

There is noting wrong with that. When you send an SMS it is sent on the so called "uplink" (from phone to the network) and the response is send back on the so called "downlink" (from network to phone) and as you are capturing only the downlink it is expected to see only the response and not the original SMS. That's why I've asked you to test with receiving an SMS.

A link to your github issue - https://github.com/ptrkrysik/gr-gsm/issues/472

Regards,
Vasil

[Jack Finderman]

 thank you very much for your suggestion i'll try and post the result here.

[Jack Finderman]

I already test send 1 sms and still got SMS-STATUS-REPORT, did you have another idea why this happen? is that posible that because i using blackberry for sending message?

[Vasil Velichkov]

Hi Jack,

On 08/08/2019 10.52, Jack Finderman wrote:
> I already test send 1 sms and still got SMS-STATUS-REPORT, did you have
> another idea why this happen?

Try receiving an SMS that you send from another phone.

> is that posible that because i using
> blackberry for sending message?

I doubt that but who knows, try another phone.

[Jack Finderman]

Try receiving an SMS that you send from another phone.

i already try this and got same result, i think i need to change the operator and see the diffrent 

I doubt that but who knows, try another phone.

what phone you use to get Kc? 

[Vasil Velichkov]

Hi Jack,

On 12/08/2019 06.35, Jack Finderman wrote:
>
>>
>> Try receiving an SMS that you send from another phone.
>>
> i already try this and got same result, i think i need to change the
> operator and see the diffrent

Trying different things is always a good approach.

>
> I doubt that but who knows, try another phone.
>
> what phone you use to get Kc?

You could get Kc using AT commands from most Android and feature phones. Here are some links:

https://domonkos.tomcsanyi.net/?p=369
https://osmocom.org/projects/security/wiki/A5_GSM_AT_tricks
https://forum.xda-developers.com/galaxy-s2/help/how-to-talk-to-modem-commands-t1471241

[Nikos Balkanas]

SMS is a GSM standard. All mobile OS (blackberry, android, etc) adhere
to it, or they wouldn't be able t0 use SMS...

On Thu, Aug 8, 2019 at 10:52 AM Jack Finderman <jack.fi...@gmail.com> wrote:
>
> I already test send 1 sms and still got SMS-STATUS-REPORT, did you have another idea why this happen? is that posible that because i using blackberry for sending message?
>

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[Nikos Balkanas]

It is much easier to get the BTS downlink (~50 W) than the mobile
uplink (~50 mW). You would have to be in close proximity to the
mobile, and use appropriate directional antennas.
Uplink is separated from downlink by ~50 Mhz.

HTH
Nikos

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