Failing to mount exFat on Linux

I have an exFAT filesystem in a microSD card (devide /dev/sdi appears in dmesg when I plug it using a microSD to USB adapter). The card works on Android, and I want to mount it in Fedora 23. I tried these:

 mount /dev/sdi1 /mnt/gn-sd
 mount -t exfat /dev/sdi1 /mnt/gn-sd
 mount.exfat /dev/sdi1 /mnt/gn-sd
 mount -a -t exfat /dev/sdi1 /mnt/gn-sd

All of them give the very same output:

 FUSE exfat 1.2.3

Yet, the device is not mounted anywhere. Nothing happened, mount command shows nothing. The command fsck /dev/sdi1 simply gives

 fsck from util-linux 2.28

and exits immediately with exit code 0. The command sfdisk -l /dev/sdi gives the following:

Disk /dev/sdi: 59.5 GiB, 63864569856 bytes, 124735488 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot Start       End   Sectors  Size Id Type
/dev/sdi1  *     2048 124735487 124733440 59.5G  c W95 FAT32 (LBA)

and this is dmesg output:

usb 3-11: new high-speed USB device number 13 using xhci_hcd
usb 3-11: New USB device found, idVendor=05e3, idProduct=0736
usb 3-11: New USB device strings: Mfr=3, Product=4, SerialNumber=2
usb 3-11: Product: USB Storage
usb 3-11: Manufacturer: Generic
usb 3-11: SerialNumber: 000000000272
usb-storage 3-11:1.0: USB Mass Storage device detected
scsi host12: usb-storage 3-11:1.0
scsi 12:0:0:0: Direct-Access     Generic  STORAGE DEVICE   0272 PQ: 0 ANSI: 0
sd 12:0:0:0: Attached scsi generic sg9 type 0
sd 12:0:0:0: [sdi] 124735488 512-byte logical blocks: (63.9 GB/59.5 GiB)
sd 12:0:0:0: [sdi] Write Protect is off
sd 12:0:0:0: [sdi] Mode Sense: 0b 00 00 08
sd 12:0:0:0: [sdi] No Caching mode page found
sd 12:0:0:0: [sdi] Assuming drive cache: write through
 sdi: sdi1
sd 12:0:0:0: [sdi] Attached SCSI removable disk
 sdi: sdi1

Any idea what is happening?

Are you sure you have exfat support? It does not come by default with most (all?) distros in Linux. First you should install these two packages,

sudo apt-get install -y exfat-utils exfat-fuse

and then you should try to mount your device.