I have bought dual sim version M250E, no NFC no fingerprint sensor. So far didn't get any OTA updates security patch level 1.Jan.2017, build number NRD90U, soft version V10a-EUR-XX. It is dual stand-by phone, and both SIMs work on 3g simultaneously. SIM2 can be removed without removing the battery.When you want to make a call there is no option to select which SIM to use for the call, default SIM is used. If default SIM is not OK you can change default sim, wich is easy, but this affects all the following calls. the other option is to edit conntacts and assign the SIM used for calling the contact. I have noticed that from time to time phone drains battery very fast. I have foud out that this happens when Mobile data is ON. With Mobile data ON, phone uses 19-21 % of batery per 3 hours in what is close to stand-by mode, wich is very bad. I have bought my on a discount price 120€, can't say i am happy becouse I offten use Mobile data. For the regular price, no way, overpriced