If you have tried to log in too many times your account may have been temporarily locked, from memory this is 4 hours. Have your tried logging in using a mobile app as this does not require the sms verification? You wont be able to use the mobile app if your account is locked though.
I don't have a phone capable of Google Play (or iPhone market), so far it seems I can't get the .apk file from blockchain.info without having Google Play.
Also, my phone is rooted, so I don't think it's a good idea letting my phone have access to my wallet. At least, some time ago I heard that the blockchain.info app stored the wallet plaintext on your device. I'm not sure how it's now though.