LTE-M with Magenta Austria does not attach

[Zoe Pfister]

Dear all,
I have tried to connect to the internet using LTE-M. For that, I received an LTE-M SIM from Magenta Austria.
I have followed the example shown in https://development.pycom.io/tutorials/networks/lte/ (using the correct APN and band information) without success. The network won't attach.
Using the lte.send_at_cmd('AT!="fsm"') command shows that the TOP FSM is changing between SCANNING, SYNCING, etc.
On the other hand, lte.send_at_cmd('AT!="showphy"') always shows an RSRP of -21474836.00, similar to a previous post (https://forum.pycom.io/search?term=rsrp&in=titlesposts).
Does someone have any idea on how I could manage to attach to the network? Any previous experiences with Magenta Austria in this regard?
Thank you very much!

[Alexander Pilhar]

I think I finally found an answer on how to properly reset the modem in case it just won't attach to a network.

Reset the modem by sending following AT-command:
lte.send_at_cmd('AT+SQNSFACTORYRESET=?')

Unlike lte.factory_reset() - which seems to use AT-command AT+SQNSFACTORYRESET - this command will successfully reset the modem to factory state.

A reboot of the device is necessary to finalize the reset!

After this process the modem should attach to the network without any issues!

Also, for further information see: AT Commands Reference Manual, 15.1 Device Reset to Factory State

[Alexander Pilhar]

@Zoe-Pfister I have some experience with Magenta Austria! Had the same issue too :D
See the following topic for more: FiPy unable to connect to T-Mobile NL (LTE-M)

Unfortunatly, I still don't really know if it just takes forever when trying to attach the first time or if you really have to do a lte.factory_reset() and let if scan for itself without specifying a particular band.

Give it a try - hope it helps!

[Jorge Romero]

Hi @Zoe-Pfister, I want to know if you could fix this issue, I have the same problem, Is not possible to attach the cellular Network, in my case Vodafone and Telecom Italia. The version of the firmware is LR5.1.1.0-47510. Thank you in advance

[jcaron]

@Zoe-Pfister what version of the firmware and of the modem firmware are you using? I suppose you checked for coverage at your location?