Quote Originally Posted by aratti View Post
Mikebar, there is no need to waste pic memory space for checking the signal coverage.
The main reason is that the system will use "SMS" for answering and if signal is too poor than modem will not send the message till signal will return to an acceptable level.
YEP, that's the reason why SMS messages are delayed for minutes hours (carrier dependant) BUT
U must have in mind that SIM card (were SMS are stored by default) has 20 memory location for only SMS if you try to send more, the answer becomes an "ERROR" instead and you wont know what exactly happen, if you really want to know what happen you should check GSM coverage !

Quote Originally Posted by aratti View Post
Linoko, very likely your siemens 35 use only "PDU mode" and you need "TEXT mode".

To check if your phone works in text mode, connect it to hyperteminal and Tx the following command:

AT+CMGF=1

press enter and check the answer.

If answer is "OK" then your phone works also in TEXT mode.

Al.
please don't forget saving your phone settings using:
AT+CMGF=1 <CR><LF>
AT&W<CR><LF>