I want to test my application and for that purpose I need some free SMS API that can work globally. This is just for testing purpose and my requirement is just for 15-20 sms. I tried lot of sms apis given by google and mentioned in stackoverflow but none helped.
One helped smsglobal but after sending 2 sms and it stopped working .
Any suggestions will help.
If you're just testing you could use the sms/email gateway, besides that Twilio might have something you could test with (Not sure about the costs though). If you're looking for Short Code testing then I don't know of any free aggregators who do that, but some do offer testing plan rates like OpenMarket
You will get what you pay for usually.
I ran an SMS website a few years ago, and evaluated a lot of the commercial and free gateways that were available back then. By far the best, and one of the cheapest was www.clickatell.com
I think they give you 10 credits for free on sign up, and then you have to start purchasing. It's a worldwide service.
Their API is very comprehensive and flexible as well.
You can use the BulkSMS API to send to almost any network worldwide. The API also includes testing modes, which don't actually send messages, but do all the relevant tests and then pretend to fail or succeed depending on your requirements.
This may not be what you're looking for, but I was thinking about developing a site many years ago (probably around 2002) aimed at allowing users to upload images/audio clips to a main HTML site, after which point they could surf to the WAP site with their phones and download the image/audio clip to use as a wallpaper or ringtone. Alternately, the server could also send the image/audio file to their phones via SMS. Back then most phones didn't have a micro-USB port and few people had the means or knowledge to transfer files to their phone from a computer, so I thought this would be a useful service. Unfortunately, I only ever got the WAP-transfer method to work, which was limited to <1MB on most cellular providers.
In any case, the reason I couldn't send the files via SMS was because I was a high school student and I couldn't afford to pay for an SMS gateway. So my approach was to send SMS messages by e-mail, as most major cellular providers offer an email address where each cellphone could be reached. It's usually in the form of something along the lines of ###.###.####@t-mobile.us. This worked just fine for basic SMS texting, but I could never figure out a way to attach files to the message (a normal e-mail attachment didn't work).
But if your application only needs to send text messages and you're only servicing a specific country, then this may be a viable option. It's not the best, but it's free.
I would also suggest Twilio. They are in the same camp as companies like ClickaTell, but seem a little smaller and easier to get started with. They have a simple-to-use rest API and offer a better two-way SMS option than ClickaTell IMHO. ClickaTell has also experienced some outages recently that required us to look for other vendors.