|[[File:Alert.png|left|link=]]||<b>{{{sim_type|Micro-}}}SIM card insertion/removal must be performed when device is powered off – external voltage {{{battery|and internal battery}}} disconnected. Otherwise {{{sim_type|Micro-}}}SIM card might be damaged or device will not detect it.</b>
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[[File:Alert.png|left|link=]] <br> <b>{{{sim_type|Micro-}}}SIM card insertion/removal must be performed when device is powered off – external voltage {{{battery|and internal battery}}} disconnected. Otherwise {{{sim_type|Micro-}}}SIM card might be damaged or device will not detect it.</b><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>