Successfull connection attempt:
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) starting connection 'Claro'
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 3 -> 4 (reason 0)
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled...
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started...
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete.
Dec 17 14:33:03 eg1144740 NetworkManager: Tried to set deprecated property gsm/band
Dec 17 14:33:03 eg1144740 NetworkManager: Tried to set deprecated property gsm/band
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 2 of 5 (Device Configure) scheduled...
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 2 of 5 (Device Configure) starting...
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 4 -> 5 (reason 0)
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 2 of 5 (Device Configure) successful.
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 3 of 5 (IP Configure Start) scheduled.
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 2 of 5 (Device Configure) complete.
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 3 of 5 (IP Configure Start) started...
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 5 -> 7 (reason 0)
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Starting pppd connection
Dec 17 14:33:03 eg1144740 NetworkManager: <debug> [1261067583.804102] nm_ppp_manager_start(): Command line: /usr/sbin/pppd nodetach lock nodefaultroute user claro ttyUSB0 noipdefault noauth usepeerdns lcp-echo-failure 0 lcp-echo-interval 0 ipparam /org/freedesktop/NetworkManager/PPP/0 plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so
Dec 17 14:33:03 eg1144740 NetworkManager: <debug> [1261067583.805693] nm_ppp_manager_start(): ppp started with pid 6348
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 4 of 5 (IP6 Configure Get) scheduled...
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 3 of 5 (IP Configure Start) complete.
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 4 of 5 (IP6 Configure Get) started...
Dec 17 14:33:03 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 4 of 5 (IP6 Configure Get) complete.
Dec 17 14:33:03 eg1144740 pppd[6348]: Plugin /usr/lib/pppd/2.4.4/nm-pppd-plugin.so loaded.
Dec 17 14:33:03 eg1144740 pppd[6348]: pppd 2.4.5 started by root, uid 0
Dec 17 14:33:03 eg1144740 pppd[6348]: Using interface ppp0
Dec 17 14:33:03 eg1144740 pppd[6348]: Connect: ppp0 <--> /dev/ttyUSB0
Dec 17 14:33:03 eg1144740 NetworkManager:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Dec 17 14:33:03 eg1144740 NetworkManager:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Dec 17 14:33:03 eg1144740 pppd[6348]: CHAP authentication succeeded
Dec 17 14:33:03 eg1144740 pppd[6348]: CHAP authentication succeeded
Dec 17 14:33:13 eg1144740 pppd[6348]: Could not determine remote IP address: defaulting to 10.64.64.64
Dec 17 14:33:13 eg1144740 pppd[6348]: Cannot determine ethernet address for proxy ARP
Dec 17 14:33:13 eg1144740 pppd[6348]: local  IP address 187.26.153.61
Dec 17 14:33:13 eg1144740 pppd[6348]: remote IP address 10.64.64.64
Dec 17 14:33:13 eg1144740 NetworkManager: <info>  PPP manager(IP Config Get) reply received.
Dec 17 14:33:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 4 of 5 (IP4 Configure Get) scheduled...
Dec 17 14:33:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 4 of 5 (IP4 Configure Get) started...
Dec 17 14:33:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 5 of 5 (IP Configure Commit) scheduled...
Dec 17 14:33:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 4 of 5 (IP4 Configure Get) complete.
Dec 17 14:33:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 5 of 5 (IP Configure Commit) started...
Dec 17 14:33:14 eg1144740 NetworkManager: <info>  Clearing nscd hosts cache.
Dec 17 14:33:14 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 7 -> 8 (reason 0)
Dec 17 14:33:14 eg1144740 NetworkManager: <info>  Clearing nscd hosts cache.
Dec 17 14:33:14 eg1144740 NetworkManager: <info>  Policy set 'Claro' (ppp0) as default for routing and DNS.
Dec 17 14:33:14 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) successful, device activated.
Dec 17 14:33:14 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 5 of 5 (IP Configure Commit) complete.


Second (failed) attempt:
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) starting connection 'Claro'
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 3 -> 4 (reason 0)
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled...
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started...
*NEXT LINE SHOULD NOT BE HERE* 
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 4 -> 6 (reason 0)
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete.
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled...
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started...
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 6 -> 4 (reason 0)
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 4 -> 6 (reason 0)
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) complete.
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) scheduled...
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  Activation (ttyUSB0) Stage 1 of 5 (Device Prepare) started...
Dec 17 14:08:13 eg1144740 NetworkManager: <info>  (ttyUSB0): device state change: 6 -> 4 (reason 0)