Does anyone know how to add photos using a Samsung tablet?

Welcome, viejomiggy. Have you tried the mobile site?
http://m.mingle2.com/users/home

Hello, I am having trouble uploading my photo also. I have an LG phone. I dont know what kind.

Welcome, L0vEisReal. We do support Androids, so you will be able to upload photos. When it comes to uploading a photo to Mingle2, make sure that the file you are trying to upload is the right type (.gif, .jpg, or .bmp format). These three formats are the only types of image file that we support.

Also, when it comes to uploading images to a Mingle2 account, the actual file size is almost unlimited. The number of pixels in the image, however, is limited to 10 million. In other words, the product of width times length must not exceed 10000000.

I am having trouble uploading pics. It simply won't do it from my windows phone. No error message or anything. Can anyone help?

Welcome, Ashton169. We do not support Windows phones, but it might be worth the effort to try uploading using the full-site interface:
http://m.mingle2.com/prefer_mainsite

This, of course, assumes that the photo files satisfy the requirements noted in my reply above.