I’ve just faced this problem yesterday. For app developers out there who are using the Twitter API for their apps or normal webmasters who need the API for their plugins and scripts, you will find that Twitter requires the account to have an associated mobile number before it allows access levels higher than “Read”. For those living in countries that are supported, great for you. For others, activating your mobile number can be a really difficult or even an impossible task. You will most likely face either one of these problems when trying to add a mobile number:

1. Your carrier isn’t listed
2. Your carrier is “listed” but it doesn’t work giving error “Sorry, we don’t have a connection to your carrier yet!”
3. You waste money to send a message using the long code method but it doesn’t work.
4. You submit a form for review but after waiting and waiting there isn’t any reply.

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