I get spam ad messages from a few companies regularly on my phone. And when I try to block them using the option given on the messaging application a custom message says that the number is invalid and cannot be blocked. So, how to stop such messages sent by unknown numbers?

  • This may work for you- it does for me. 1. create a contact for this purpose with spurious number 2.Use Textra messaging app and from People in Conversation>add contact add to the contact created in 1 3. Blacklist it
    – beeshyams
    Feb 19, 2017 at 13:32
  • "create a contact for this purpose with spurious number". The problem is that the sender has no visible number! @beeshyams
    – user210340
    Feb 19, 2017 at 13:33
  • Just give it any number- like 999999, which isn't valid. Then you add this sms contact as pager/ home or any other option
    – beeshyams
    Feb 19, 2017 at 13:40
  • @beeshyams Textra doesn't work (isn't compatible) on my Samsung tab 4. Any other option?
    – user210340
    Feb 19, 2017 at 13:55
  • Sorry, but I do remember that this question was asked before and answered- suggest you search this site thoroughly
    – beeshyams
    Feb 19, 2017 at 13:57

1 Answer 1


Try this SMS Organizer app.
Apart from a host of other features, this app lets you set 'rules'. For example, you can set a rule to auto delete any message when the sender's phone number/contact name contains a certain sequence.

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If you are unsure about deleting, you can also set the rule to move the sms to a folder (This app also lets you create folders for sms), say a spam folder

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