G900MD Loses imei after room! now just sim 2 works. - Galaxy S 5 Q&A, Help & Troubleshooting

Hello guys!
I need some help, but first sorry about my english!
I have a samsung s5 duos, G900MD that i bought original from samsung.
Those days i put a new rom from russia and lost my Imei, the cell phone shows 2 imeis but not the same that have on the back of the phone.
Now only sim 2 works great, sim one get signal, works 3g but i cant make a call, only some times, but most of the time doesnt work.
Some times shows "not registred" and some times the device try to make the call but quicly goes to red and lose the call.
I want to know if have some way to got my imei back, or if have some other fix that i can apply to fix the phone!
Tks every body for the help!
Att,
Renato Oliveira.

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flashing doesnt change it, it just says not registered on network when i make a call
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turn off the phone
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Same problem here. please anyone help to solve it
happens with me sometimes...for me i found it to be service providers fault..put the sim in another slot and see..dont use dual sim...the other slot hangs sometimes...
I bought my phone in februari, after one month this problem started. When i restart the phone i can work with it a few days after it start over. Within a week u can not work with the phone any more becose it allso blocks when i whant to do a call. I have to reset it then. After three weeks it al starts over. This problem is with connection for calls, for data and for gps.
I writed the problems to samsung, they send me to a offical samsung repairer for free repair with my garantee. They said that i had cut sims and the problems maight be this, so i bought 2 new mini sim cards. But no fix. Then i gave the phone for a week to the repairer, they gave it back to me, i saw they had reset my phone, after three weeks the problems restart. So i beleve they just reset my phone and that took a week. I went back to the repairer with the same problems. Then the phone staid two weeks there. They get an update cernell with kies they said. But after three weeks i had the problems again. I went back to the repairer and they said that the phone is an import and beause of that they could not do anything more, they send me back to the seller.
So i went back to the seller. They took the phone for five weeks and answerd me that there are problems with the motherbord, costs are 250 euro, this problem was made by manual shocks like a fall or something, they sey there ara some scarves on the phone. So it was my fault and the garantee is void. They just send me the phone back without repair and don't belave that the problem was there sinds i baught the phone.
I'm vary mad, i just want to hit the phone with a hammer, that woold be a real manual schock.
In the meen while, my friend gave me a reserve phone with broken glass buth very good working phone.
I think i'll buy a new phone, i chinees or something, no expensive samsung that doesnt work properly and a service blaming me with that. At the end i lose 400 euros.

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