HEY MY PEOPLE ..before before listen oo I'm using phantom A made by tecno os version 4.1 but as time goes on I wanted to upgrade it from 4.1 to 4.3 jelly bean becos 4.4 kitkat will soon be out by October 2013, key lime pie 5.0 also will be out next year as you know tecno sell their phones with OS versions ...in any android phone except tecno both HTC,Sony Ericsson,Motorola's, Samsung,LG I have touched them by upgrading from one another look at phantom just ordinary unrecognized device said by Rom Manager during clockworkmod recovery setup can you imagine you can't upgrade or downgrade tecno phone's with any choice of yours, so why are you still permutattes on this unrecognized device ...one guy said it earlier that's tecno N7 made by HTC cooperated who told you that if you know that then go and make use of HTC syn manager or run a Rom Manager and make use of it and see how useless is N7 generally tecno phone see ordinary HTC G2 DESIRE Z I'm running OS version 4.2.2 on it now so when we're talking about android phones don't even mention tecno cos I'm a good developer and I know some tecno weak point ... I have rooted some phones and upgraded from 2.3.4 to 4.2.2 and so on but tecno noway...so please don't talk about phantom or N7 generally tecno I love other model cos they make their phone perfectly made. so Samsung s3 is good and recognized device you can even upgrade it yourself but tecno you can't....(àbíkú lomo bó se lo ló bò) that's Yoruba for you