Wiki Knowledge Base | Teltonika GPS

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FMM640 Product Change Notifications (view source)

Revision as of 16:11, 14 April 2023

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==2023.04.12: SIM usage recommendation update==
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We would like to inform you about the SIM usage recommendation change - due to SIM card market tendencies (Standard size SIM cards being made to split to 3 parts) [https://wiki.teltonika-gps.com/view/FMC640_First_Start#How_to_insert_SIM_card_and_connect_the_battery FMC640 First Start]
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! colspan="3" style="text-align: left; background: white;" |Recommendation description
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|-
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| style="width: 20%; text-align: left; background: white;" |Recommendation reason
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| colspan="2" style="width: 80%; text-align: left; background: white;" |Due to SIM card market tendencies (Standard size SIM cards being made to split to 3 parts)
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|-
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| style="text-align: left; background: white;" |Detailed description
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| colspan="2" style="text-align: left; background: white;" |New paragraph about SIM usage is added to product First Start description. <br>
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Previously SIM insertion recommendation was only described in schematics - <b>SIM1 shown in lower slot, SIM2 in upper slot.</b>  [[File:Fmb640-cover-3.png|center|400px]]
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<br>
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Due to SIM market tendencies the documentation was updated to more clearly state SIM1 and SIM2 usage recommendations:
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<br>
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[[File:SIM_3in1.png|left|230px]] <b>FMX6 devices use Standard size SIM cards for SIM1 and SIM2. Currently most of the SIM cards provided by operators can be disassembled into 3 parts - Standard/Micro/Nano. Depending on the SIM card construction - during device usage in harsh conditions, SIM assembly might come apart which causes instability when connecting to operator.<br>
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To avoid such risk:<br>
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1) If possible - ask operator for Standard SIM card with solid construction (not pre-cut to 3 parts)<br>
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2) Do not use SIM cards that were previously disassembled (SIM was taken apart previously)<br>
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3) If you plan to use only one SIM card - insert it into SIM1 slot (lower slot) - this ensures greater pressure on SIM contacts as the contact bed is pushed by PCB.<br>
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When 2 SIM cards are used simultaneously risk is mitigated as well - when SIM1 is inserted, a greater pressure is applied for SIM2, so SIM parts are harder to come lose </b><br>
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! colspan="3" style="text-align: left; background: white;" |Change impact
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|-
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| style="width: 221px; text-align: left; background: white;" |Risk assessment
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| colspan="2" style="width: 908px; text-align: left; background: white;" |Recommendation updated to mitigate risk.
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|-
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| style="text-align: left; background: white;" |Suggested implementation plan
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| colspan="2" style="text-align: left; background: white;" | If you used one SIM card and it's placed in SIM1 slot (lower) - <b>no implementation plan needed.</b><br>
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If you used 2 SIM cards - SIM1 in lower slot, SIM2 in upper slot - <b>no implementation plan needed.</b><br>
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If you used eSIM - <b>no implementation plan needed.</b><br>
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If you used one SIM card and it is inserted into SIM2 slot (upper) - <b>to mitigate risk of bad operator connectivity due to SIM construction - for future installations - when only 1 SIM card is used - insert it into SIM1 slot (lower) </b>
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Additionally: '''If possible - ask operator for Standard SIM card with solid construction (not pre-cut to 3 parts)'''
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Retrieved from "https://wiki.teltonika-gps.com/view/Special:MobileDiff/84685"