Cannot send photos to android

Then it would be easier to send the photos with mail, add the photos to a mail and send them to the gmail address. Or add the GDrive to the iPhone or iCloud to the Android phone.

But the initial intention was looking for a direct device to device communication using Bluetooth or WLAN (AirDrop). So far I know there is no solution. You can send the photos from the iPhone to a Mac and then to the Android.

There are USB storage sticks with Lightning connector, it worked with iOS 11, I never tested them with iOS 12.

I expect a solution from Apple supporting the transfer of photos from iOS to Android.

Have you contacted your cellular provider to be certain your plan includes the MMS option? Have they confirmed that the MMS option is properly configured?

Do you have data enabled on your iPhone?