in addition to Julio's comments, who is your ISP/Provider ? The initial configuration you have posted is, and you said it yourself, sort of messy. Is there a reason you need stuff like dialer watch, multiple scripts, and multiple outside interfaces ?
for the sake of simplicity I have sanitized your configuration. Imortant parts are marked in bold. See if you get this to work. Keep in mind that you have no authentication...who is your ISP ?
Building configuration...
Current configuration : 3416 bytes ! ! Last configuration change at 16:18:10 UTC Wed Feb 28 2018 ! version 15.6 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Router ! boot-start-marker boot-end-marker ! no aaa new-model ip dhcp excluded-address 192.168.10.1 ! ip dhcp pool LAN network 192.168.10.0 255.255.255.0 default-router 192.168.10.1 dns-server 8.8.8.8 8.8.4.4 lease 9 ! ip cef no ipv6 cef ! multilink bundle-name authenticated ! chat-script gsm "" "ATDT*99#" TIMEOUT 60 "CONNECT" ! license udi pid C881G-4G-GA-K9 sn FCZ2147E2DH ! username admin privilege 15 password 0 admin ! redundancy ! controller Cellular 0 lte sim data-profile 1 attach-profile 1 slot 0 lte modem link-recovery rssi onset-threshold -110 lte modem link-recovery monitor-timer 20 lte modem link-recovery wait-timer 10 lte modem link-recovery debounce-count 6 ! interface Cellular0 ip address negotiated ip nat outside ip virtual-reassembly in encapsulation slip dialer in-band dialer idle-timeout 0 dialer string gsm dialer-group 1 async mode interactive ! interface FastEthernet0 no ip address ! interface FastEthernet1 description LAN no ip address ! interface FastEthernet2 no ip address ! interface FastEthernet3 no ip address ! interface FastEthernet4 no ip address shutdown duplex auto speed auto ! interface Vlan1 ip address 192.168.10.1 255.255.255.0 ip nat inside ip virtual-reassembly in ! ip forward-protocol nd no ip http server no ip http secure-server ! ip nat inside source list 1 interface Cellular0 overload ! ip route 0.0.0.0 0.0.0.0 Cellular0 ip ssh server algorithm encryption aes128-ctr aes192-ctr aes256-ctr ip ssh client algorithm encryption aes128-ctr aes192-ctr aes256-ctr ! access-list 1 permit 192.168.10.0 ! dialer-list 1 protocol ip permit ! control-plane ! mgcp behavior rsip-range tgcp-only mgcp behavior comedia-role none mgcp behavior comedia-check-media-src disable mgcp behavior comedia-sdp-force disable ! mgcp profile default ! vstack ! line con 0 exec-timeout 0 0 script dialer cdma login no modem enable line aux 0 line 2 no activation-character no exec transport preferred none stopbits 1 line 3 script dialer gsm no exec speed 384000 line 8 no exec speed 384000 line vty 0 4 login transport input none ! scheduler allocate 20000 1000 ! end
