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@ -5,7 +5,7 @@ |
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Given how ubiquitous phone numbers are and how long they've been around, it's |
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surprising how many false assumptions programmers continue to make about them. |
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1. **An individual has a phone number** |
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1. **An individual has a phone number** |
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Some people do not own phones, or do not wish to provide you with their |
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telephone number when asked. Do not require a user to provide a phone number |
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@ -61,17 +61,17 @@ surprising how many false assumptions programmers continue to make about them. |
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Some may be dialable only if the caller is a subscriber to a particular |
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telecom company. |
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1. **You can send a text message to any phone number** |
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1. **You can send a text message to any phone number** |
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A lot of people still only have a fixed-line telephone, which typically cannot |
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send or receive text messages. |
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**Tip:** Whenever possible, try and accommodate these |
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users by calling them with a voice message or voice prompts. Alternatively, |
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if your service requires sending text messages, verify that the number |
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can receive text messages after the user provides it. |
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**Tip:** Whenever possible, try and accommodate these users by calling them |
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with a voice message or voice prompts. Alternatively, if your service |
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requires sending text messages, verify that the number can receive text |
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messages after the user provides it. |
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1. **Only mobile phones can receive text messages** |
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1. **Only mobile phones can receive text messages** |
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Some service providers support sending and receiving text messages to fixed-line |
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numbers. There are also online services like Skype that can send and receive |
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