What is AT command?
It used to development other more function ,we can send to you freely if you need
When SMS modem send bulk SMS, how many characters one message support ?
It follows International standard 160 English characters or 70 Chinese characters ,if beyond ,will come to next message automatically .
Does SMS modem need to connect internet to use ?
No need
If i feel your SMS modem price is high ,may I get lower price ?
We have different module different ladder price SMS modem for you choose .more detail and discount please contact sales team
When I receive product and find some issue ,what should I do ?
Contact sales and tell about the issue ,we will provide free and strong tech support to help you .