Not able to send or receive SMS

Connectivity SIM Cards
1

My Hologram sim is registered as Roaming on Verizon(US) network and it’s able to get and post data on websites. However, SMS doesn’t work. For SMS send I get Failed message. Below is the log-snippet:

00:23:19.194 -> FONA> s
00:23:43.775 -> Send to #+4477977xxxxx
00:23:47.034 -> Type out one-line message (140 char): test message at 4/27 1223
00:24:06.820 -> —> AT+CMGF=1
00:24:06.820 -> <— OK
00:24:06.858 -> —> AT+CMGS="+4477977xxxxx"
00:24:07.424 -> <— >
00:24:07.424 -> > test message at 4/27 1223
00:24:07.459 -> ^Z
00:24:17.920 -> Failed
00:24:17.920 -> FONA>

2

Any update would be appreciated. Is there anyway I can check whether, hologram SIM is able to send the SMS to the hologram-dashboard in the first place? That’ll allow me to confirm that SMS is being sent but the target SIM-card network is not able to accept the SMS message.

I am using Arduino SIM7000A shield and AT Commands as can be seen in the original post.

3

Have you tried it without the + at the front of the number? Some devices have trouble with that.

4

Yes, I tried without + at the front of the number and that failed too.

5

Ok and I’m assuming the "x"s aren’t there in the actual command?

6

Yes, x are actually a phone number. I am wondering if I can put the sim card in a cellphone and it’ll allow me to camp onto LTE network.

7

After changing the network to AT&T I am able to send SMSs. Thanks for the support.

8

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