with the ios update to 18.3 unable to send sms with App.CanOpenUrl Erel gave me this link
www.b4x.com
to try MessageComposer. I downloaded the example given and it works fine but I can't get it to work with BAXpages
in my baxpages app i have the button to send sms on the main page
Mails and SMS messages
MailComposer and MessageComposer types from the iPhone library allow the user to send mails and SMS messages from your app. The users will see a pre-filled form which they can modify and send. (press on the small gear button and set the quality to HD) Not all devices support these two...

in my baxpages app i have the button to send sms on the main page
B4X:
Private Sub SendSMS
Dim smsc As MessageComposer
smsc.Initialize("smsc")
smsc.SetRecipients(Array As String("123332323")) 'must be strings!
smsc.Body = "Hello!!!"
smsc.Show(Page1)
End Sub
Sub smsc_Complete (Result As Int)
If Result = smsc.RESULT_SENT Then
hd.ToastMessageShow("Message sent", True)
Else
hd.ToastMessageShow("Message was not sent", True)
End If
End Sub