Problems with FB app on iphone

Hi

This is not a recuest only for Iphone, but also for Facebook. I have tried everything, but i can not log in on my FB account. I write my e-mail/phone number and my password. and then I am about to recieve a 6 digit number on SMS. But I never get the SMS. I can use an authenicator, but the one I have show 8 numbers and are for my hotmail. I also see that my husband has a direfent setup on the Facebook app on his Iphone. I have very few options when I go to Settings - Facebook app.

Do you know how it is possible to log in the facebook when I don`t recieve sms? Is there another konfiguration on my Iphone I can use?

Regards,

Åsne