Nokia S40 filesystem SMS format¶
This text is work in progress and does not claim to be correct or accurate. It is solely based on Gammu dumps received from users. Analysed by Michal Cihar <michal@cihar.com>.
File structure¶
- 176 bytes header
- at offset 7 is length of PDU data
- at offset 94 is stored remote number in unicode
- rest is not known
- PDU data (without SMSC)
- here can be sometimes also some failure block, which is not known yet
- structured data header: 0x01 0x00 <LEN>, where <LEN> is length of rest
- structured blocks:
Block: <TYPE = byte> <LENGTH = word> <DATA …>
Blocks¶
- 0x01
- Unknown x00 / x01 (maybe received / sent)
- 0x02
- SMSC number, ASCII
- 0x03
- Text, unicode
- 0x04
- Sender, unicode
- 0x05
- Recipient, unicode
- 0x06
- Unknown x00x00x00x00
- 0x07
- Unknown x00
- 0x08
- Unknown x02 / x00
- 0x09
- Unknown x00x00x00x00
- 0x0a
- Unknown x00
- 0x0b
- Unknown x00
- 0x0c
- Unknown, several values (maybe message reference per number)
- 0x0d
- Unknown x00x00
- 0x0e
- Unknown x00x00
- 0x0f
- Unknown x00x00
- 0x22
- Unknown x00
- 0x23
- Unknown x00x00x00x00
- 0x24
- Unknown x00
- 0x26
- Unknown x00
- 0x27
- Unknown x00
- 0x2a
- Unknown x00
- 0x2b
- some text (Sender?), unicode
- To test:
- multiple recipients sms