[CentOS] Samsung M800

I have a Samsung M800 phone that I had (wrongly) assumed would show up
as a USB drive on Linux so I can transfer files to it and so on.

Instead, it appears to present itself as a modem.  Is there any way to
make it appear as a usb drive?

Dec  1 13:47:17 mutt kernel: usb 5-1: new full speed USB device using
uhci_hcd and address 3
Dec  1 13:47:17 mutt kernel: usb 5-1: configuration #1 chosen from 1
choice
Dec  1 13:47:18 mutt kernel: cdc_acm 5-1:1.0: ttyACM0: USB ACM device
Dec  1 13:47:18 mutt kernel: usbcore: registered new driver cdc_acm
Dec  1 13:47:18 mutt kernel: drivers/usb/class/cdc-acm.c: v0.25:USB
Abstract Control Model driver for USB modems and ISDN adapters
Dec  1 13:47:37 mutt kernel: usb 5-1: USB disconnect, address 3
Dec  1 13:47:38 mutt kernel: usb 5-1: new full speed USB device using
uhci_hcd and address 4
Dec  1 13:47:38 mutt kernel: usb 5-1: configuration #1 chosen from 1
choice
Dec  1 13:47:38 mutt kernel: scsi9 : SCSI emulation for USB Mass Storage
devices
Dec  1 13:47:43 mutt kernel: usb 5-1: USB disconnect, address 4
Dec  1 13:47:44 mutt kernel: usb 5-1: new full speed USB device using
uhci_hcd and address 5
Dec  1 13:47:45 mutt kernel: usb 5-1: configuration #1 chosen from 1
choice
Dec  1 13:47:45 mutt kernel: cdc_acm 5-1:1.0: ttyACM0: USB ACM device
Dec  1 13:51:13 mutt kernel: usb 5-1: USB disconnect, address 5
nd address 6
Dec  1 13:51:16 mutt kernel: usb 5-1: configuration #1 chosen from 1
choice
Dec  1 13:51:16 mutt kernel: cdc_acm 5-1:1.0: ttyACM0: USB ACM device

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