NR7101 unable to connect to web.vodafone.de

Hi there,
first of all: with my vodafone-cube I get a connection to a nearby antenna, even inside the building, the quality is not so good though.

With the NR7101 placed outside and directed towards the antenna, the connection remains down all the time, although the cells are listed in the scans. The APN-settings are the same as with the vodafone-cube.

I tried all different kind of things: original modem firmware R11A03 + router firmware 100ABUV3C0, automatic settings (manual APN setting though).

Then upgraded to R11A07 / 100ABUV5C0, still no connection. After each FW upgrade I did factory reset.

Now my latest test here in detail:

• firmware R11A07 / 100ABUVC6b1_0221
• manual APN web.vodafone.de
• Restriction to 4G
• 4G-PCI scan shows all available Cells!
• Locking to the "target cell" does not help (tested with and without locking, even to several vodafone-cells which are shown in the PCI-scan)
  

Here comes the debug-logging:
Feb 21 00:00:23 user.notice RILCMD: set_LTE_connection_status: Down
Feb 21 00:00:23 user.notice RILCMD: zcfg_get_sim_slot() Preferred SIM Slot: 0
Feb 21 00:00:23 user.notice RILCMD: zcfg_get_sim_slot() Detach Switch: 0
Feb 21 00:00:24 user.notice RILCMD: SIM card ready after initialization
Feb 21 00:00:24 user.notice RILCMD: NR7101 with RG500Q/RG502Q module
Feb 21 00:00:26 user.notice RILCMD: GNSS function enable
Feb 21 00:00:27 user.notice RILCMD: User config RFCN&PCI to set cell lock/unlock
Feb 21 00:00:27 user.notice RILCMD: AT+QNWLOCK="common/4g",1,1801,378
Feb 21 00:00:31 user.notice RILCMD: User config RFCN&PCI to set cell lock/unlock
Feb 21 00:00:31 user.notice RILCMD: AT+QNWLOCK="common/5g",0
Feb 21 00:00:44 user.notice RILCMD: RILCMD_AUTO_APN flag enable.
Feb 21 00:00:44 user.notice RILCMD: PrevSetAccessTechnology:
Feb 21 00:00:55 user.notice RILCMD: RS_INIT::g_attach_status:0, item_ptr->attach_status:0
Feb 21 00:00:55 user.notice RILCMD: Change state from RS_INIT to RS_UPDATE.
Feb 21 00:00:55 user.notice RILCMD: RILCMD STATE: RS_INIT ============> RS_UPDATE
Feb 21 00:00:56 user.notice RILCMD: ************************* CM Connect *************************
Feb 21 00:00:56 user.notice RILCMD: *****working_cid:1****enable == [ 1] **
Feb 21 00:00:57 user.notice RILCMD: profile[1] = web.vodafone.de///0, pincode = (null)
Feb 21 00:00:57 user.notice RILCMD: PSAttachedState: 0
Feb 21 00:00:57 user.notice RILCMD: IPv4ConnectionStatus:1
Feb 21 00:00:57 user.notice RILCMD: IPv6ConnectionStatus:1
Feb 21 00:00:57 user.notice RILCMD: Close qmiclientId[0][1] 50
Feb 21 00:00:57 user.notice RILCMD: Close qmiclientId[0][2] 52
Feb 21 00:00:57 user.notice RILCMD: Close qmiclientId[0][3] 53
Feb 21 00:00:57 user.notice RILCMD: Close qmiclientId[0][11] 54
Feb 21 00:00:57 user.notice RILCMD: Close qmiclientId[0][17] 51
Feb 21 00:00:57 user.notice RILCMD: Close all the qmiclientIds of idx=0.
Feb 21 00:00:59 user.notice RILCMD: cid: 1 cgact_status[0]:0
Feb 21 00:01:00 user.notice RILCMD: RILCMD STATE: RS_UPDATE ============> RS_READY
Feb 21 00:01:01 user.notice RILCMD: quectel_rg500q_ready() Next to RS_ATTACH state
Feb 21 00:01:01 user.notice RILCMD: RILCMD STATE: RS_READY ============> RS_ATTACH
Feb 21 00:01:02 user.notice RILCMD: PrevSetAccessTechnology: LTE
Feb 21 00:01:03 user.notice RILCMD: RILCMD STATE: RS_ATTACH ============> RS_UPDATE
Feb 21 00:01:04 user.notice RILCMD: ************************* CM Connect *************************

-> This CM-Connect loops forever, the connection status stays "down" all the time.

What is going wrong here? Anyone else managed to connect to vodafone?

Thanks for any hints/ solutions!