The image you uploaded appears to be cropped. If that is the exact file you are trying to view, the problem is that it is cropped. There is insufficient information to determine why.
Try copying the file directly from the memory card, as Hueco suggests. If the result is not cropped, there is probably a problem with software configuration. If the file on the memory card is cropped, it is probably a camera setting.
I checked the resolution and the setting is set to highest resolution. Why photos are not coming full screen?
If your problem is related to black bars along the sides of the photo, that is normal.
DSLRs usually capture with a 3:2 aspect ratio. Most modern computers, tablets, and phone displays have 16:9 aspect ratios. Older monitors have 4:3 and 5:4 aspect ratios, so the black bars would appear along the top and bottom. Some tablets do have 3:2 aspect ratios. A couple that come to mind are Acer Aspire Switch Alpha 12 and a few Microsoft Surface Pros.
Black bars do not appear with pictures taken directly on your phone because phone cameras often have the same aspect ratio as the display on the same phone.
The image you uploaded appears to be cropped. If that is the exact file you are trying to view, the problem is that it is cropped. There is insufficient information to determine why. If it is not the file you are viewing, please upload the original file.