GSM Modems or phones are not designed for sending bulk messages at high rate. You will need to either get in touch with some bulk SMS providers or virtual-number providers that lets you do this. If you need a phone number to appear as sender-id in India, you will need to do this using a virtual number only.
I've been trying to send bulk messages via a GSM modem and found that the GSM network architecture makes clients incapable of sending more than ~10 sms/minute or, allegedly, ~30 sms/minute using GPRS. Exact limits depend on the modem/device, provider and reception. To send more, as was suggested already, you need to look into a (paid) gateway service connected directly to a messaging centre.
i had experience sending 40000 sms at once. to do this contact gsm operators directly. they can send about 50 sms per second via direct connection to sms center. usualy they have web interface connected to sms center, have ways to provide basic data about people (gender, day of birth etc). You upload phone database to web interface and fire up your delivery. you get wholesale price for your delivery
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GSM 调制解调器或电话不适用于高速发送大量消息。您需要联系一些批量短信提供商或允许您执行此操作的虚拟号码提供商。如果您需要一个电话号码在印度显示为发件人 ID，则只需使用虚拟号码即可。
GSM Modems or phones are not designed for sending bulk messages at high rate. You will need to either get in touch with some bulk SMS providers or virtual-number providers that lets you do this. If you need a phone number to appear as sender-id in India, you will need to do this using a virtual number only.
我一直在尝试通过 GSM 调制解调器发送批量消息，发现 GSM 网络架构使客户端无法使用 GPRS 发送超过约 10 条短信/分钟，或者据称，约 30 条短信/分钟。确切的限制取决于调制解调器/设备、提供商和接收。要发送更多信息，正如已经建议的那样，您需要研究直接连接到消息中心的（付费）网关服务。
I've been trying to send bulk messages via a GSM modem and found that the GSM network architecture makes clients incapable of sending more than ~10 sms/minute or, allegedly, ~30 sms/minute using GPRS. Exact limits depend on the modem/device, provider and reception. To send more, as was suggested already, you need to look into a (paid) gateway service connected directly to a messaging centre.
我有一次发送40000条短信的经验。为此，请直接联系 GSM 运营商。他们可以通过直接连接到短信中心每秒发送大约 50 条短信。通常他们有连接到短信中心的网络界面，有办法提供有关人的基本数据（性别、出生日期等）。您将电话数据库上传到网络界面并启动交付。您的交货将获得批发价
i had experience sending 40000 sms at once. to do this contact gsm operators directly. they can send about 50 sms per second via direct connection to sms center. usualy they have web interface connected to sms center, have ways to provide basic data about people (gender, day of birth etc). You upload phone database to web interface and fire up your delivery. you get wholesale price for your delivery
是的，GSM/GPRS 调制解调器确实无法以高速率发送消息。您需要访问 SMS 中心或 SMS 网关，如此处所述！
Yes, it is true that GSM/GPRS modems cannot send messages at a high rate. You would need access to an SMS Centre or SMS Gateway as mentioned here!
这是因为同步消息传递模型。
如果要发送 100 条消息，则只有一个线程会执行这一消息发送活动。
如果您使用
python，则有一个多处理模块http://docs.python.org/library/multiprocessing.html。
你的编程语言中也会有类似的方法。
This is because of synchronous messaging model.
If you want to send 100 messages, only one thread will be executing this messaging sending activity.
In case you use
pythonthere is a multiprocessing modulehttp://docs.python.org/library/multiprocessing.html.
There will be similar method in your programming language.