Please help me troubleshoot Android USB Modem issue.

[hbar98]

Howdy!

I cannot seem to properly tether my phone to my AC66U router.

Here's the hardware:
Moto X OG, 4.4.4, on Verizon. Unlocked and rooted.
RT-AC66U with Firmware Version:3.0.0.4.376_3754

I have USB WAN enabled. I selected USA as the country and Verizon as the carrier. Left everything default, so the dial number is #777, username and password is left blank. So is the APN and CID.

When I enable USB tethering on the phone, the router shows that the connection is disconnected.

However, if I plug the phone directly into my computer and enable USB tethering, the connection works fine.

I finally went over to the system log and saw a couple lines that concerned me, but I'm not really sure...

Would anyone be able to help me out? The log follows:

Dec 31 17:00:12 syslogd started: BusyBox v1.17.4
Dec 31 17:00:13 kernel: klogd started: BusyBox v1.17.4 (2015-01-10 19:34:47 CST)
Dec 31 17:00:13 kernel: start_kernel
Dec 31 17:00:13 kernel: Linux version 2.6.22.19 (root@asus) (gcc version 4.2.3) #1 Sat Jan 10 19:37:50 CST 2015
Dec 31 17:00:13 kernel: CPU revision is: 00019749
Dec 31 17:00:13 kernel: Found an ST compatible serial flash with 32 64KB blocks; total size 2MB
Dec 31 17:00:13 kernel: Determined physical RAM map:
Dec 31 17:00:13 kernel:  memory: 07fff000 @ 00000000 (usable)
Dec 31 17:00:13 kernel:  memory: 08000000 @ 87fff000 (usable)
Dec 31 17:00:13 kernel: Built 1 zonelists.  Total pages: 585216
Dec 31 17:00:13 kernel: Kernel command line: root=/dev/mtdblock3 console=ttyS0,115200 init=/sbin/preinit
Dec 31 17:00:13 kernel: Primary instruction cache 32kB, physically tagged, 4-way, linesize 32 bytes.
Dec 31 17:00:13 kernel: Primary data cache 32kB, 4-way, linesize 32 bytes.
Dec 31 17:00:13 kernel: PID hash table entries: 2048 (order: 11, 8192 bytes)
Dec 31 17:00:13 kernel: CPU: BCM5300 rev 1 pkg 0 at 600 MHz
Dec 31 17:00:13 kernel: Using 300.000 MHz high precision timer.
Dec 31 17:00:13 syslog: module ledtrig-usbdev not found in modules.dep
Dec 31 17:00:13 syslog: module leds-usb not found in modules.dep
Dec 31 17:00:13 kernel: Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
Dec 31 17:00:13 kernel: Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
Dec 31 17:00:13 kernel: Mount-cache hash table entries: 512
Dec 31 17:00:13 kernel: PCI: Initializing host
Dec 31 17:00:13 kernel: PCI: Reset RC
Dec 31 17:00:13 kernel: PCI: Initializing host
Dec 31 17:00:13 kernel: PCI: Reset RC
Dec 31 17:00:13 kernel: PCI: Fixing up bus 0
Dec 31 17:00:13 kernel: PCI/PCIe coreunit 0 is set to bus 1.
Dec 31 17:00:13 kernel: PCI: Fixing up bridge
Dec 31 17:00:13 kernel: PCI: Fixing up bridge
Dec 31 17:00:13 kernel: PCI: Enabling device 0000:01:00.1 (0004 -> 0006)
Dec 31 17:00:13 kernel: PCI: Fixing up bus 1
Dec 31 17:00:13 kernel: PCI/PCIe coreunit 1 is set to bus 2.
Dec 31 17:00:13 kernel: PCI: Fixing up bridge
Dec 31 17:00:13 kernel: PCI: Fixing up bridge
Dec 31 17:00:13 kernel: PCI: Enabling device 0000:02:00.1 (0004 -> 0006)
Dec 31 17:00:13 kernel: PCI: Fixing up bus 2
Dec 31 17:00:13 kernel: IP route cache hash table entries: 4096 (order: 2, 16384 bytes)
Dec 31 17:00:13 kernel: TCP established hash table entries: 16384 (order: 5, 131072 bytes)
Dec 31 17:00:13 kernel: TCP bind hash table entries: 16384 (order: 4, 65536 bytes)
Dec 31 17:00:13 kernel: highmem bounce pool size: 64 pages
Dec 31 17:00:13 kernel: pflash: found no supported devices
Dec 31 17:00:13 kernel: Boot partition size = 262144(0x40000)
Dec 31 17:00:13 kernel: Creating 2 MTD partitions on "sflash":
Dec 31 17:00:13 kernel: 0x00000000-0x00040000 : "pmon"
Dec 31 17:00:13 kernel: 0x001f0000-0x00200000 : "nvram"
Dec 31 17:00:13 kernel: Found a Zentel NAND flash with 2048B pages or 128KB blocks; total size 128MB
Dec 31 17:00:13 kernel: lookup_nflash_rootfs_offset: offset = 0x0
Dec 31 17:00:13 kernel: nflash: squash filesystem with lzma found at block 9
Dec 31 17:00:13 kernel: Creating 4 MTD partitions on "nflash":
Dec 31 17:00:13 kernel: 0x00000000-0x02000000 : "linux"
Dec 31 17:00:13 kernel: 0x00134ec0-0x02000000 : "rootfs"
Dec 31 17:00:13 kernel: 0x04000000-0x06000000 : "linux2"
Dec 31 17:00:13 kernel: 0x04134ec0-0x06000000 : "rootfs2"
Dec 31 17:00:13 kernel: Creating 3 MTD partitions on "brcmnand":
Dec 31 17:00:13 kernel: 0x00000000-0x02000000 : "trx"
Dec 31 17:00:13 kernel: 0x04000000-0x06000000 : "asustrx2"
Dec 31 17:00:13 kernel: 0x06000000-0x07f00000 : "brcmnand"
Dec 31 17:00:13 kernel: dev_nvram_init: _nvram_init
Dec 31 17:00:13 kernel: u32 classifier
Dec 31 17:00:13 kernel:     OLD policer on 
Dec 31 17:00:14 kernel: Netfilter messages via NETLINK v0.30.
Dec 31 17:00:14 kernel: nf_conntrack version 0.5.0 (2048 buckets, 16384 max)
Dec 31 17:00:14 kernel: ipt_time loading
Dec 31 17:00:14 kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Dec 31 17:00:14 kernel: net/ipv4/netfilter/tomato_ct.c [Jan 10 2015 19:37:13]
Dec 31 17:00:14 kernel: ip6_tables: (C) 2000-2006 Netfilter Core Team
Dec 31 17:00:14 kernel: VFS: Mounted root (squashfs filesystem) readonly.
Dec 31 17:00:14 kernel: Warning: unable to open an initial console.
Dec 31 17:00:14 kernel: Failed to execute /sbin/preinit.  Attempting defaults...
Dec 31 17:00:14 kernel: Algorithmics/MIPS FPU Emulator v1.5
Dec 31 17:00:14 kernel: ctf: module license 'Proprietary' taints kernel.
Dec 31 17:00:14 kernel: et_module_init: passivemode set to 0x0
Dec 31 17:00:14 kernel: et_module_init: et_txq_thresh set to 0x400
Dec 31 17:00:14 kernel: bcm_robo_enable_switch: EEE is disabled
Dec 31 17:00:14 kernel: eth0: Broadcom BCM47XX 10/100/1000 Mbps Ethernet Controller 6.30.163.2002 (r382208)
Dec 31 17:00:14 kernel: wl_module_init: passivemode set to 0x0
Dec 31 17:00:14 kernel: PCI: Enabling device 0000:01:01.0 (0000 -> 0002)
Dec 31 17:00:14 kernel: eth1: Broadcom BCM4331 802.11 Wireless Controller 6.30.163.2002 (r382208)
Dec 31 17:00:14 kernel: PCI: Enabling device 0000:02:01.0 (0000 -> 0002)
Dec 31 17:00:14 kernel: eth2: Broadcom BCM4360 802.11 Wireless Controller 6.30.163.2002 (r382208)
Dec 31 17:00:14 kernel: SCSI subsystem initialized
Dec 31 17:00:14 kernel: ufsd: driver (8.6 U86_r187446_b122, LBD=ON, acl, ioctl, rwm, ws, sd) loaded at c020a000
Dec 31 17:00:14 kernel: NTFS (with native replay) support included
Dec 31 17:00:14 kernel: optimized: speed
Dec 31 17:00:14 kernel: Build_for__asus_n66u_2011-10-27_U86_r187446_b122
Dec 31 17:00:15 hotplug: add net usb0.
Dec 31 17:00:17 hotplug: Got net usb0, vid 0x22b8, pid 0x2e25.
Dec 31 17:00:17 kernel: wlc_phy_cal_init_acphy: NOT Implemented
Dec 31 17:00:17 stop_nat_rules: apply the redirect_rules!
Dec 31 17:00:18 WAN(0) Connection: Ethernet link down.
Dec 31 17:00:18 hotplug: set net usb0.
Dec 31 17:00:23 WAN(0) Connection: Ethernet link up.
Dec 31 17:00:23 rc_service: wanduck 355:notify_rc restart_wan_if 0
Dec 31 17:00:23 dnsmasq[384]: warning: interface ppp1* does not currently exist
Dec 31 17:00:23 RT-AC66U: start httpd
Dec 31 17:00:23 syslog: Generating SSL certificate...
Dec 31 17:00:24 disk monitor: be idle
Dec 31 17:00:25 miniupnpd[414]: HTTP listening on port 59707
Dec 31 17:00:25 miniupnpd[414]: Listening for NAT-PMP traffic on port 5351
Dec 31 17:00:28 kernel: option_indat_callback: resubmit read urb failed. (-19)<3>option_indat_callback: resubmit read urb failed. (-19)<3>option_indat_callback: resubmit read urb failed. (-19)<3>option_indat_callback: resubmit read urb failed. (-19)<6>option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0
Dec 31 17:00:29 hotplug: remove net usb0.
Dec 31 17:00:29 chat[506]: Can't restore terminal parameters: Input/output error
Dec 31 17:00:29 hotplug: add net usb0.
Dec 31 17:00:30 WAN(0) Connection: Ethernet link up.
Dec 31 17:00:30 hotplug: Got net usb0, vid 0x22b8, pid 0x2e25.
Dec 31 17:00:31 hotplug: set net usb0.
Dec 31 17:00:35 WAN(0) Connection: Fail to connect with some issues.
Dec 31 17:00:49 kernel: eth1: received packet with  own address as source address
Dec 31 17:03:54 hotplug: remove net usb0.
Dec 31 17:03:54 kernel: hub 1-1:1.0: unable to enumerate USB device on port 2
Dec 31 17:04:00 hotplug: add net usb0.
Dec 31 17:04:02 hotplug: Got net usb0, vid 0x22b8, pid 0x2e25.
Dec 31 17:04:03 hotplug: set net usb0.
Dec 31 17:05:21 rc_service: httpd 385:notify_rc start_autodet
Dec 31 17:08:41 hotplug: remove net usb0.

Any help would be appreciated! Thank you for your time!