Instead of using WIFI, better go with 2G/3G network.
Either while clicking on app listed on offer page to reach play-store, use 2G/3G network afterward you can use WIFI to download and complete the app offer to earn Mcent credit.
2. IMEI changer.apk (To change IMEI)
3. Google Setting [Already pre-installed] (To change Google AD Id)
4. Fast Reboot.apk (To reboot mobiles/phone without re-starting normally)
Download Mcent.apk from your Mcent referral link.
Register for a new account and verify with OTP.
Download applications listed below from offer list (Most offers are visible when you are on mobile network).
2. Amazon app (Download and open to receive credit)
3. Ifame app (Download and open to receive credit)
4. UC browser app (Download and open to receive credit)
5. Nimbuzz app (Download and open , register to complete the offers, doesn’t requires verification of mobile so you can keep any numbers randomly)
6. Cleartrip app (Download and open, register to complete the offers, doesn’t requires verification of mobile so you can keep any numbers randomly)
7. Savan app (Download and open, play a full song to receive credit)
After completing all those 7 apps offer you will receive at-least 130-150 in your Mcent account.
Now you can transfer these credits to your main account [325 credit/Day transfer limit per account].
Now, backup all these 7 apps including Mcent app too.
Change the data value of app 1, 2, 3 and minimize then click repeatedly 3-4 times on app 4, it reboots the apps required and save the time by stopping the device restart.
Click on Mcent referral link and after reaching play-store minimize it and install the backup file of Mcent
Register again new account
Similarly do for all offers listed while reaching play-store minimize and install backup file, you will receive the credit instantly