Doubs about the right procedure to do in order to wake-up the MC60 after the sleep mode

IoT Modules GSM Module
1

Hi,
I’ve some doubs about the right procedure to follow in order to wake-up the MC60 after the sleep mode.
In details, when I’ve to wake-up the module MC60 from the sleep mode, I send the follow commands:

  1. AT+QSCLK=0 (MC60 answers with OK)
  2. AT+CREG=1 (MC60 answers with OK)
  3. AT+CGREG=1 (MC60 answers with OK)
  4. AT+CGATT=1 (After more 100 seconds the module does not answer)
    After, I send other commands (for example AT) but the module does not answer yet; I resolve rebootting the module. In order to give more information, I noticed while I wait the answer to the commad AT+CGATT the module send the notification ‘+CGREG +0’ and ‘+CGREG +5’.
    Could you indicate me where is the problem?

Best regards,
Giampietro