# External Hologram SIM **URL:** \ **Category:** Uncategorized\ **Created:** [December 10, 2021, 2:37am UTC](https://discuss.blues.com/t/external-hologram-sim/547 "2021-12-10T02:37:54Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![mdede439](https://avatars.discourse-cdn.com/v4/letter/m/bcef8e/32.png) [@mdede439](https://discuss.blues.com/u/mdede439)\ **Post date:** [December 10, 2021, 2:37am UTC](https://discuss.blues.com/t/external-hologram-sim/547/1 "2021-12-10T02:37:54Z")
I am using the Notecarrier AF with an ESP32 Feather. I am able to get everything working and uploading data to Notehub using the built in SIM but I cannot get the device to connect using an external Hologram SIM. Do I need to select an APN like in one of the forum posts, {“req”:“card.wireless”,“mode”:",[airtelgprs.com](http://airtelgprs.com)"} except specify Hologram? If so do I just select {“req”:“card.wireless”,“mode”:",[hologram.com](http://hologram.com)"}?? ---
**Author:** ![RobLauer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/roblauer/32/1567_2.png) [@RobLauer](https://discuss.blues.com/u/RobLauer)\ **Post date:** [December 10, 2021, 2:35pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/2 "2021-12-10T14:35:19Z")
Hi @mdede439, If you’re using a Hologram SIM (the first five digits of the SIM should be “89445”), please use the following [card.wireless](https://dev.blues.io/reference/notecard-api/card-requests/#card-wireless) command: ```auto { "req": "card.wireless", "apn": "hologram" } ``` You can also consult our [Using External SIM Cards guide](https://dev.blues.io/notecard/notecard-guides/using-external-sim-cards/). Thanks, Rob ---
**Author:** ![mdede439](https://avatars.discourse-cdn.com/v4/letter/m/bcef8e/32.png) [@mdede439](https://discuss.blues.com/u/mdede439)\ **Post date:** [December 10, 2021, 4:56pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/4 "2021-12-10T16:56:52Z")
Thanks for the response, however when I use the external SIM it does recognize there is one inserted, then sees it as an AT&T SIM and tries to connect. After it fails it looks like it sees it as a Hologram SIM and tries to connect and then fails. It never connects with the external SIM. I am going to try the `card.wireless`call and see if that changes things. Thanks. Michael D. ---
**Author:** ![mdede439](https://avatars.discourse-cdn.com/v4/letter/m/bcef8e/32.png) [@mdede439](https://discuss.blues.com/u/mdede439)\ **Post date:** [December 10, 2021, 6:20pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/5 "2021-12-10T18:20:43Z")
I have tried using { “req”: “card.wireless”, “apn”: “hologram” } But still no luck. I had a look at your guide and it doesn’t really say when or how to use the command. Do I send it once and the card saves this configuration over reset or power off/on? Do I send it anytime and it will change its configuration and start trying to connect via the new APN? Do I set the new APN and then insert the SIM? Does any of this make any difference? Does the version of Note Card I have make a differnce? I am using the NB GL 500. ---
**Author:** ![RobLauer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/roblauer/32/1567_2.png) [@RobLauer](https://discuss.blues.com/u/RobLauer)\ **Post date:** [December 10, 2021, 6:32pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/6 "2021-12-10T18:32:06Z")
Hi @mdede439, I think we need to capture a trace log on this device so we can see what is happening. Can you please run through the instructions provided [in this forum post](https://discuss.blues.com/t/how-do-i-capture-a-trace-information-from-notecard/152) (you can use the online REPL at [https://dev.blues.io](https://dev.blues.io) to save the trace) and then PM it to me here? Thanks, Rob ---
**Author:** ![mdede439](https://avatars.discourse-cdn.com/v4/letter/m/bcef8e/32.png) [@mdede439](https://discuss.blues.com/u/mdede439)\ **Post date:** [December 10, 2021, 8:58pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/7 "2021-12-10T20:58:56Z")
I wasn’t sure what you meant by PM you so I just replied to this email. On the forum post I do not see anyway of uploading log files, just pictures. The log file is the whole history of my experimentation with this device. I do not know how to clear the history. (Attachment notecard\_2021-12-10T20\_51\_36.761Z.log is missing) ---
**Author:** ![RobLauer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/roblauer/32/1567_2.png) [@RobLauer](https://discuss.blues.com/u/RobLauer)\ **Post date:** [December 13, 2021, 10:40pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/8 "2021-12-13T22:40:31Z")
Hi @mdede439 , Sorry for the delay! Upon looking at your trace log, the Hologram SIM is trying to connect to GSM, which won’t work: ```auto {"status":"Hologram APN hologram scanning GSM then M1 then NB1","sync":true} ``` Can you please try card.wireless command that will force a connection to Cat-M1? ```auto { "req": "card.wireless", "mode": "m" } ``` ---
**Author:** ![mdede439](https://avatars.discourse-cdn.com/v4/letter/m/bcef8e/32.png) [@mdede439](https://discuss.blues.com/u/mdede439)\ **Post date:** [December 13, 2021, 11:04pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/9 "2021-12-13T23:04:19Z")
Do the Note card keep all these configuration changes in memory over a power cycle or reset? if so how do I reset the config to factory? ---
**Author:** ![RobLauer](https://sea2.discourse-cdn.com/flex020/user_avatar/discuss.blues.com/roblauer/32/1567_2.png) [@RobLauer](https://discuss.blues.com/u/RobLauer)\ **Post date:** [December 14, 2021, 5:06pm UTC](https://discuss.blues.com/t/external-hologram-sim/547/10 "2021-12-14T17:06:11Z")
Hi @mdede439, Take a look at the [card.restore](https://dev.blues.io/reference/notecard-api/card-requests/#card-restore) API to perform a factory reset.