# SIM Detect problem

**URL:** <https://forum.sierrawireless.com/t/sim-detect-problem/14233>\
**Category:** IoT Modules\
**Created:** [October 22, 2018, 7:00am UTC](https://forum.sierrawireless.com/t/sim-detect-problem/14233 "2018-10-22T07:00:41Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![carlos.tangerino](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/carlos.tangerino/32/2551_2.png) [@carlos.tangerino](https://forum.sierrawireless.com/u/carlos.tangerino)\
**Post date:** [October 22, 2018, 7:00am UTC](https://forum.sierrawireless.com/t/sim-detect-problem/14233/1 "2018-10-22T07:00:41Z")

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I’m using HL6528 and it is very common receive message “+CME ERROR: SIM not inserted” after AT+CPIN?.  
When I power up the whole thing it works fine but not always the reset procedure works (RESET\_IN pin)  
Is there a “recipe” on how to power up and reset modem including timings?  
I’m not using DTR, I try to turn the module on/reset and pray for it to work.  
Indeed the module works fine but there is this SIM CARD message.  
Any help will be very appreciated.  
Thanks