bblboy54 writes: "While there isn't any (published) official word from T-Mobile or from Twitter, it appears that T-Mobile has begun blocking users from sending SMS messages to the Twitter service. There are a few blog posts popping up regarding this including one over at Alternageek. I personally called T-Mobile last night and spoke with 3 different representatives before finally being told that "T-Mobile does not support third party message providers and while you were able to use the Twitter service previously, this was the result of a bug in their system which has now been corrected." When I specifically asked if I could expect to ever be able to use Twitter with T-Mobile again I was told that it wouldn't occur until Twitter made a contract with T-Mobile (the same mentality that ISPs are using to destroy net neutrality). This can be confirmed by asking anyone on T-Mobile to send an SMS to the Twitter short code (40404) and they will most likely receive a service is unavailable message which has been the result for the last 3 days."