https://wiki.teltonika-gps.com/index.php?action=history&feed=atom&title=Template%3AFMM640_Dual_SIM 2026-04-30T00:21:56Z Revision history for this page on the wiki MediaWiki 1.43.5 https://wiki.teltonika-gps.com/index.php?title=Template:FMM640_Dual_SIM&diff=43245&oldid=prev 2019-08-22T10:30:21Z

<p>Created page with &quot;==Introduction to Dual SIM Functionality== {{{model|FMM640}}} is able to operate in DUAL SIM switching mode to minimize the bill accounts for GSM/GPRS services. SIM1 card has...&quot;</p> <p><b>New page</b></p><div>==Introduction to Dual SIM Functionality==<br /> {{{model|FMM640}}} is able to operate in DUAL SIM switching mode to minimize the bill accounts for<br /> GSM/GPRS services.<br /> <br /> SIM1 card has higher priority than SIM2. For one SIM<br /> card using it must be placed in SIM1 slot for FMM640 to switch minimum times. (SIM1 SLOT is closer to PCB, SIM2 SLOT<br /> is the upper one).<br /> If SIM card is inserted into SIM 2 slot and 1 SIM operator list mode is used, FMM640 will<br /> work normally, but there will be more switching activities. In addition, APN settings in GPRS<br /> should be entered for SIM 1 and SIM 2 to avoid not sending records over GPRS.<br /> <br /> SIM 1 and SIM 2 APN settings are set in the GPRS tab (Figure). Information about APN and<br /> authentication type should be provided by your GSM operator.<br /> <br /> [[File:dual.png]]<br /> <br /> <br /> <br /> * &#039;&#039;&#039;Dual SIM algorithm&#039;&#039;&#039;<br /> Two SIM cards use algorithm is shown in the diagram below :<br /> <br /> [[File:algo.png]]<br /> <br /> <br /> <br /> * &#039;&#039;&#039;Home Network&#039;&#039;&#039;<br /> <br /> {{{model|FMM640}}} gets possible operator codes list from the network and compares them with the operator codes<br /> inserted in Home profile’s list. At first, it tries to connect to SIM 1 Home Operator, if operator is<br /> unreachable; the device switches to SIM 2 slot and tries to connect to SIM 2 Home Operator.<br /> When the connection procedure is successful, FMM640 stays connected to the available<br /> Home operator using the SIM card, which was inserted for and works according to the Home<br /> profile parameter settings.<br /> If none of the Home operators could be connected with, FMM640 switches to the SIM 1<br /> card tries to connect to its roaming operators from SIM 1 Roaming profile.</div>

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