MTK 6227 Second Sim problem Only 1 IMEI

i have a Sigmatel e55 mobile phone. Its a dual SIM Set (Its IMEi Nos. are 3521.............& IMEISV:78.) The second SIM does not workig. Please provde me a valid IMEI No. or give me advice how can I activate my second SIM.

No two imei numbers are not allotted to single phone...
Try using different sim or on settings use enable 2 sims option!!1

when u press *#06# your phone shows imei and imeisv no. , so actually only one sim has a valid imi no.
so u have to to a valid imei installation shop n have to get a valid imei installed

nktel phone double sim invalid problem IMEI;135790246811220

Your phone is a Dual Band, it only works with 900/1800mhz. Make sure that the Sim install in the second Sim slot work for these bands here. Other wise it won't work. Another problem could be the imei number, most of the time it can be resolve by changing the imei number for the second Sim slot, but is kind of hard.

OK, try troubleshooting the problem like this: Go to the Sim's profile in the background, it should be in the third page. It have a sim icon, tap on it and verify that the dual sim is checked. Now go to the settings in the main page, tap it and go to the network set up, tap it, now here if you have both sim cards install, choose the one that you are having trouble with, I believe that is sim slot #2, so choose sim 2, and tap on network set up, and choose the network that service the sim card. If that doesn't work, check the imei number for the sim 2, and compare it from the one in the back cover, if they don't match, you need to change the imei number. Go to www.mysciphone.com and download a program that allows you to change the imei, just in case, good luck.

I have on ZTC K300 china mobile. I started to have this problem at this week...
My SIM 1 is working normal, but the second one says ''Invalid SIM card''. When i check the IMEI´s, this mobile have only one IMEI instead of 2. The mobiles with 2 IMEI´s is working normal... Have any thing i can do to add a new one IMEI to this phone, so i think and i hope will work?

Email me your IMEI and i shall get your master security code.

Go to Settings/Dual SIM settings and choose Dual SIM open. Perhaps this is the problem.

Settings>Dual SIM settings>Select "Dual SIM open>click OK