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Truecaller has updated its filtering algorithm to narrow down its spam list to a regional level. Previously the company filtered the list on a national level, however, it mentions that India sees more than 300 million spam calls per month, so it narrowed it down on a regional basis.

The company mentions that it only stores up to 2,000 entries of top spammer list, and with the volume of spam in India, spam numbers in certain regions will not be relevant in others. By creating localised lists in regions that receive the most spam, users in those areas will more likely have only have entries for spam numbers in their region, making blocks more effective. However, Truecaller does not mention how it divides regions up.

Truecaller will continue to store only up to 2,000 entries, but these will now be region specific. The company said that it updates the list daily. The company currently claims that the new algorithm effectively filters out 79% of spam calls in the country, as opposed to around 66% before.

Highest spam: According to Truecaller’s data, Delhi users receive 60 million spam calls every month, while those in Mumbai get around 52 million spam calls monthly. Andhra Pradesh and Gujarat receive over 40 million spam calls each every month, while Maharashtra (excluding Mumbai) and Karnataka receive over 36 million. Other spam prone states include Madhya Pradesh with 20 million monthly spam calls and Tamil Nadu and Rajasthan with over 16 million monthly spam calls each.

Recent updates from Truecaller:

– In March this year, Truecaller added three new features: availability (online/offline) status of contacts, call history feature that replaces unknown numbers with names and a built-in dialer that allows an user to make calls directly from the Truecaller app.

– In February, Truecaller launched an SDK called TrueSDK, that will let app developers verify users via their phone numbers and login using their Truecaller profiles.

– In October 2015, Truecaller reported that it had crossed over 100 million users in India. Truecaller claims to have a database of 1.7 billion numbers from the country and blocks over 120 million spam calls daily. The company planned to hit 150 million users in India by the end of 2015.

– In September 2015, Truecaller introduced an ‘availability’ feature on its Truedialer Android app where users could turn their availability to on and off. For this, both the users trying to call each other need to set Truedialer as their default calling app for to see these details, implying that the feature will be visible to only other Truedialer users.

– In July 2015, Truecaller launched an Android messaging app called Truemessenger, which claimed to have an automated spam filter, for the Indian market. Truemessenger would essentially do what Truecaller does for phone calls: identify the sender of the SMS through its claimed 150 million wide user base, especially for contacts outside a user’s phone book.

– In May the same year, OS-maker Cyanogen partnered with Truecaller to make the caller ID and blocking service app as its default native dialer app. The platform would roll out this integration in future OTA updates for OnePlus One and YUREKA users, as well as integrate it in future smartphones that came preloaded with Cyanogen OS.

Intex partnership: In December last year, Truecaller had partnered with Intex to integrate Truecaller and Truedialer in its Aqua Young smartphone devices. The handsets were priced at Rs 5,090 and are available online and at offline retailers.