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US SMS Features and Restrictions

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23 comments

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    Thiago Appella

    I didn't get the "Numeric sender only". What does it mean?

    Also, what is considered a long SMS? How many characters? 

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    Nexmo Support

    Long SMS is anything over 160 characters. If sending over 160 characters content to US we will be unable to form a concatenated message but for other destinations this should be fully supported. Read more about concatenated messages here.

    Using REST API, you do not need to do anything on your side with messages longer than 160 characters as we will split accordingly in 153 pieces and add the corresponding UDH to form the concatenation.

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    Jonathan

    I assume the "Long Virtual Number" is the "from" number we buy in the numbers tab?

    I can easily foresee a time when we exceed sending 500 messages a day in the USA. What should we do? Have multiple from numbers and do internal tracking to make sure we aren't sending too many messages from each one?

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    Nexmo Support

    Yes, exactly. If you foresee exceeding the 500 messages per/day/number, you can purchase more numbers and alternate those as SenderID on your messages.

     

    I hope this helps.

    Best Regards,

    Alberto

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    Jonathan

    Thanks for the swift reply Alberto.

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    Agile Poet

    Are vCards supported in the US?

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    Rio Ke LU

    "Maximum of 500 messages per day and per Long Virtual Number. If this is exceeded Number will be blocked and will no work."

    How do we define the day? within 24 hours or a natural day? if the latter, which timezone are we in?

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    Rio Ke LU

    "Maximum of 500 messages per day and per Long Virtual Number. If this is exceeded Number will be blocked and will no work."

    How do we define the day? within 24 hours or a natural day? if the latter, which timezone are we in?

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    Nexmo Support

    Within 24 hours. However, we would recommend to keep the maximum number of messages sent using a single Long Virtual Number as SenderID way below the 500 messages within 24 hours period.

    Our recommendation is to simulate what real Person to Person messaging limitations might be, so 200 messages per day and per Long Virtual Number would be our suggestion. You can purchase a pool of US Long Virtual Numbers and round robin those as SenderID for your messages to US, which would help in achieving higher than 1 SMS per second throughput and also allow to send more messages per day not having your LVNs blocked.

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    Rio Ke LU

    Thank you so much for your swift answer, Alberto. 

    Another question if it's not too much. Since we are increasingly having a huge growth for our users base.  So the demand of sending verification messages by using SMS has reached a certain scale. Will there be a way that we apply for a unique SenderID that specially designated for the US & Canada market that does not the 500 messages limit? 

    If there is a way, it would be super helpful.

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    Nexmo Support

    Unfortunately the mentioned restriction is directly imposed by US Carriers and there is no much we can do about it. As previously mentioned, the only work-around for this limitation is to alternate different senderIDs. You can check from our pool of available numbers and select numbers from different area codes which might help in creating some logic on your side to enable users from different areas in US to reply to a local number instead of having a unique Sender and reply number.

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    Jonathan

    Alberto, it would be great if Nexmo could abstract this away for us; i.e. couldn't you keep a large block of numbers & rotate between, so the whole thing would become transparent to us as long as we don't want to recieve return messages?

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    ilia

    @Alberto,

    Hi, great thread very informative

     

    Im new at this so please be gentle.

     

    New numbers are expensive, can we just keep the one LVN and borrow some of your available senderIDs?

    If i have 5000 texts to make it will take me 10 days, and thats if i make 500 a day(which you suggest not to make).

    If i want to only send during the week this will take me 2 weeks.

    if i buy 10 numbers id be able to make them in one day but the cost now is more then using a service that doesnt limit texts per day.

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    James Burden

    Is there a way to set it up to auto rotate the long numbers in your system?? Say have (5) numbers and have every message sent on my account rotate through the list?? What about short codes? Do you offer short codes and how many messages can be sent through these per day??

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    do

    if i only have a US long virtual number,could you use this LVN as sender  send sms to a CA mobile?

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    Nexmo Support

    Yes, you can use US LVN as SenderID for your messages to Canada

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    Don Rosen

    Does no binary messages mean no WAP Push? It seems that WAP push is not, in fact, working in the U.S.

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    Nexmo Support

    WAP push is most likely not widely support by all  US Carriers, as it happens with concatenated and binary messages. Please bare in mind that there is also some handsets unable to receive WAP push messages.

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    gustavo ibanez

    can I use DID purchased from a different carrier, or I have to use only DID's from nexom

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    AlexLein

    If for Canadian and US phone numbers, the "from" field is mandatory, are we unable to test/evaluate the service without paying for a virtual number first?

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    Vilash Poovala

     

      I purchased a virtual number and and I am attempting to send to a US number. The message states its a succes, but I am yet to receive a single successful SMS. Thoughts?

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    Constantine

    Me i have the same issue as Vilash, i receive the message sent on my Canadian phone number, but on the US number i just receive the status as sent successful and the message itself never reach my phone. Any suggestions about this issues or a way to debug it somehow ?

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    JamesMorris

    I had the same issue as Vilash - resolved by re-wording the message, seems certain content is blocked especially if it seems automated.

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