I'm not able to update the truecaller. Its showing error No.104. when i try to select the country it show the error (Could not connect, Please try again later. Kindly let me know the solution 

I need for true caller

http://truecaller.com/apps/get/truecaller-micromax you can get

The link http://www.truecaller.com/applications/com.truecaller-5.10-MICROMAX.apk is working .download the apk file of your latest version and install ( just replace 5.10- with latest version yoy have and download)

truecaller.com/apps/get/truecaller-micromax

The above link should work. Try it.

Since its a inbuilt app for micromax you have to download the specific app from true caller website. Try this it worked for me

http://www.truecaller.com/applications/com.truecaller-5.10-MICROMAX.apk

That I didn't know. Have you guys checked inside that app if there's available update for it to download? Have you considered uninstalling it and installing the one from Google Play?

U dumb ?? The guy asked how to update it specifically on A350 for a reason .... Micromax has custom signed the apk and so it cannot be update from gplay. Is there any sensible modder here who can suggest on how to update the app without rooting ?

Open Google Play > Swipe from left to right > My apps > check if there are apps that needs to be updated, if True Caller has an update, it should be shown there.