I can't get into the shell of my router

I am trying to enter the shell to get the mtd partition information, but I can't. Is there any way?

This is boot log.

U-Boot 1.1.3 (Feb  6 2017 - 11:27:25)


Board: Ralink APSoC DRAM:  256 MB


 ##### The CPU freq = 880 MHZ #### 


Please choose the operation: 

   1: Load system code to SDRAM via TFTP. 

   2: Load system code then write to Flash via TFTP. 

   3: Boot system code via Flash (default).

   4: Entr boot command line interface.

   7: Load Boot Loader code then write to Flash via Serial. 

   9: Load Boot Loader code then write to Flash via TFTP. 

default: 3


Boot act = 2 


MCR Image Checksum OK


## Booting image at bf140000 ...

   Image Name:   Linux Kernel Image

   Image Type:   MIPS Linux Kernel Image (lzma compressed)

   Data Size:    4004016 Bytes =  3.8 MB

   Load Address: 80001000

   Entry Point:  806c16c0


Starting kernel ...


SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
pci 0000:00:00.0: bridge configuration invalid ([bus 00-00]), reconfiguring
Device found in MTK table, ID: eff1, EXT_ID: 9500

init started: BusyBox v1.12.1 (2019-02-12 13:47:50 KST)

starting pid 55, tty '': '/etc_ro/rcS'
PIN(15) : ON ret:0

starting pid 537, tty '/dev/ttyS1': '/bin/login'
00:00:05 [CFG:INFO   ] [initHandler] init handler
[mcr_encCheckDB] Error: Cannot open /etc/conf/mcrrgw.db.xml
[mcr_loadConfigFile]File Read Error
00:00:05 [CFG:WARNING] 5|0281||VOC Alarm Start - WAN Link
killall: ntp.sh: no process killed
00:00:06 [CFG:WARNING] 3|0001||COLD Start
br0: port 1(eth2) entered forwarding state
br0: port 1(eth2) entered forwarding state
ifconfig: SIOCSIFHWADDR: Device or resource busy
sh: /tmp/mcr_wlcfg_start_client.sh: not found
br0: port 2(ra0) entered forwarding state
br0: port 2(ra0) entered forwarding state
br0: port 3(rax0) entered forwarding state
br0: port 3(rax0) entered forwarding state
eth2/eth3 RPS: CPU0/2
Configuration file: /tmp/hapd-ra0.conf
Configuration file: /tmp/hapd-rax0.conf
rfkill: Cannot open RFKILL control device
Using interface ra0 with hwaddr 88:3c:1c:41:9d:3a and ssid "KT_GiGA_5G_9D37"
ra0: interface state UNINITIALIZED->ENABLED
ra0: AP-ENABLED 
rfkill: Cannot open RFKILL control device
Using interface rax0 with hwaddr 88:3c:1c:41:9d:3b and ssid "KT_GiGA_2G_9D37"
rax0: interface state UNINITIALIZED->ENABLED
rax0: AP-ENABLED 
sh: cannot create /proc/br_mldsnoop: Permission denied
iptables: No such file or directory.
00:00:16 [CFG:WARNING] 3|0201||[wan]link up
00:00:16 [CFG:WARNING] 3|0282||VOC Alarm Stop - WAN Link
00:00:16 [CFG:WARNING] SYSTEM START COMPLETED
00:00:17 [CMON:INFO   ] [cmon_init] init pid(1493)
route: SIOCDELRT: No such process
route: SIOCADDRT: Network is unreachable
adding dns 61.41.153.2
adding dns 1.214.68.2
killall: igmprt: no process killed
00:00:20 [CFG:WARNING] 3|0284||VOC Alarm Stop - Kornet WAN IP
00:00:20 [CFG:WARNING] 3|0286||VOC Alarm Stop - Kornet DNS
adding dns 61.41.153.2
adding dns 1.214.68.2
route: SIOCADDRT: Network is unreachable
00:00:21 [CFG:WARNING] 3|0288||VOC Alarm Stop - Premium WAN IP
br0: port 1(eth2) entered forwarding state
br0: port 2(ra0) entered forwarding state
br0: port 3(rax0) entered forwarding state
basename(1)
basename(2 /sys/block/sda/sda1)
basename(2 /block/sda/sda1)
basename(2 /sda/sda1)
basename(2 /sda1)
basename(3 sda1)
basename(1)
basename(2 /sys/block/sda/sda1)
basename(2 /block/sda/sda1)
basename(2 /sda/sda1)
basename(2 /sda1)
basename(3 sda1)
try_mount(1) sda1, /var/tmp/usb/sda1
NTP: time.ktiphone.co.kr try ....[1-09:00:31]
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
NTP: time.kriss.re.kr try ....[1-09:00:31]
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
PIN(15) : OFF ret:0
iptables: No such file or directory.
iptables: No such file or directory.
START CWMPD
iptables: No such file or directory.
killall: netkeepd: no process killed
START CWMPD
route: SIOCDELRT: No such process

MiniIGD v1.04 MCRMOD_KT_01 (2019.02.12-04:48+0000).

NTP: time.ktiphone.co.kr try ....[2-09:00:51]
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
NTP: time.kriss.re.kr try ....[2-09:00:51]
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
>>CWMP_CLIENT start! ,WAN[eth4,172.30.1.131]up G_Dynamic_Premium.state[0]<<
private_network_flag [1]
NTP: time.ktiphone.co.kr try ....[3-09:01:11]
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
NTP: time.kriss.re.kr try ....[3-09:01:11]
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
ra0       mac:[0x12218]:e8afc000  
rax0      mac:[0x12218]:e8afc000  
09:01:22 [CFG:WARNING] 5|0291||VOC Alarm check - ARP request to 172.30.1.254 failed in 1 try
NTP: time.ktiphone.co.kr try ....[4-09:01:31]
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
NTP: time.kriss.re.kr try ....[4-09:01:31]
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
NTP: time.ktiphone.co.kr try ....[5-09:01:51]
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
time.ktiphone.co.kr: Unknown host
NTP: time.kriss.re.kr try ....[5-09:01:51]
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
time.kriss.re.kr: Unknown host
09:02:22 [CFG:WARNING] 5|0291||VOC Alarm check - ARP request to 172.30.1.254 failed in 2 try