Default [Q] Which recovery?

my friend is using Xperia U currently at cm11, using CWM recovery. Wifi isn't working for him, so he wants to get back to cm10.2, the problem is that he gets error 7, which afaik is cause of the 'bad'/wrong recovery. Which recovery should he install?
Using Samsung Galaxy S3 GT-i9300 (White 16GB) + 16GB SanDisk Class 10 MicroSD

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