Well, my good friend Pete, I finally found the problem I was having, you won’t believe it, it was that the sim worked fine, you said that it didn’t have enough bandwidth to update the application data and that’s why the card, although I can’t explain it to myself because the Wi-Fi was working correctly,
the card dropped 
well, I’ve been correcting the code and putting a timer in it and it’s cleaner. Well, what has been said, notice to surfers, if you put in SIM cards, take into account the sufficient bandwidth data.
Greetings and many thanks to all of you, and especially to Pete, who has been a professional helping 
the issue is resolved