In your Document Telit_UC864_AT_Reference_Guide_r8.pdf from http://www.telit.com/module/infopool/download.php?id=1947 is described:
0 – GSM 900MHz + DCS 1800MHz1 – GSM 900MHz + PCS 1900MHz2 – GSM 850MHz + PCS 1800MHz (available only on quadri-bandmodules)
3 – ?????
4 – GSM 900MHz + DCS 1800MHz + PCS 1900MHz5 – GSM 850MHz + DCS 1800MHz + GSM 900MHz + PCS 1900MHz(available only in UC864-G Telstra version)
What does the value 3 in AT command AT#BND stands for?
Thank you for your support.
For US it is recommended to use AT#AUTOBND=2. In this case AT#BND has not have effect.
Other option is to use AT#AUTOBND=0 and AT#BND=3,3
3 – 850 MHZ + 1900 MHz
Thank you that was very helpful.
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