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Malware prevention is always better than cure, and this is particularly true for your mobile devices, which contain an amazing database of personal data that hackers can use to steal your identity. Avira Antivirus Security (tinyurl.com/cyuw7de) scans your apps and app updates for malware, and its new Identity Safeguard tool lets you check whether your email has been compromised by a hacker.

Avast Ransomware Removal (tinyurl.com/q6gqo35) can remove Android Simplocker and decrypt any files that the malware has locked, so you won't have to pay the hackers’ ransom. The big antivirus firms’ security apps, including Kaspersky Intemet Security and McAfee's Free Antivirus&Security, can remove malware as well as block it but make sure that you download the official app rather than a malicious fake.