That site never had any firmware for this device it is clickbait only as there was never any
"MIFI 5510L FIRMWARE UPDATE FOR ANDROID ICE CREAM SANDWICH VERSION 4 2011 YEAR"
or some universal build or any of that other garbage they listed on there.
If you look around the web you can probly find the DUU for 5510 but it cannot/will not recover any device as
it has to check with your device and verify its credentials to run so your device has to be in normal mode for it to work.
My tool is not freeware and it is to expensive to buy for one device, however I do offer some custom recovery service if you need to recover a device or 2, you can msg me about it if you need to.
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