It would be very welcome if textra provided a way to filter out spam sms by using a specific word filter defined by the user. Most spammers do not use any specific number but use bulk messaging centres to send sms, The user gets these messages with the recipient name as a combination of a few alphabets which arre completely random, so filtering by sender number does not work here. Therefore the need to rely on word filter as they definitely advertise their name in the Sms which can be used to filter out the Junk.