HELP I flahsed my device and now I am without signal. - Android Q&A, Help & Troubleshooting

Hello I am without signal in my phone, I tried to root my phohe but I didnt work. Yesterday I went to sleep and my phone was with signal I when i woke up I didnt have any.
Can someone help?
I use a tutorial on youtube i wich it said that i needed to install patched_boot.img and I did it but the phone got stucked so I interrupted the installation.
Any Ideas?
Please help me. Sorry for my english.

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