Can I put 12GB RAM inDell 15 3558?

OPPO Reno 4 Pro does come with support for OTG (USB On The Go)This lets the device to connect directly with Hardisk/USB.Also, do not forget to find all the detailed specifications and other latest updates related to OPPO Reno 4 Pro here.

OPPO Reno 4 Pro does not come with any IP Rating for either being Water-Resistant or Dust-Resistant.However, it is a bit of a drawback as the users expect such additions at the price point of the device.Also, do not forget to find all the detailed specifications and other latest updates related to OPPO Reno 4 Pro here. 

OPPO Reno 4 Pro would definitely be supporting VoLTE.The device comes with Dual 4G Bands which lets the user to enjoy 4G connectivity on both sim slots.Also, do not forget to find all the detailed specifications and other latest updates related to OPPO Reno 4 Pro here. 

OPPO Reno 4 Pro comes with a Uni-Body Body.Thus device comes with 4000 mAh No-Removable Battery.Also, do not forget to find all detailed specifications and other latest updates related to OPPO Reno 4 Pro here.

The Realme X3 is a better device as it gives better specifications.Let's see-Processor: The Realme X3 comes with the Qualcomm Snapdragon 855 Plus processor whereas the Redmi 10x comes with the MediaTek MT6875 processor.Camera: The Realme X3 has a camera of 64 MP + 12 MP + 8 MP + 2 MP with F1.8 aperture whereas the Redmi 10x has a camera of 48 MP + 8 MP + 2 MP with F1.79 aperture.Check Full Comparison Realme X3 vs Redmi 10x

Yes, Vivo Y70s supports VoLTE in both the SIM slots since VoLTE works on bands 3,5 and 40 and both the SIM slots in Vivo Y70s supports band 3 and 40. You can use two Jio SIMs at a time in Vivo Y70s.You can check the specs of Vivo Y70s here : Vivo Y70s

Yes, the Oppo A12s will support the Wi-Fi calling feature or VoWiFi. Check what it actually is-Check Full Device Specifications :  Oppo A12s

Oppo A12s will surely support VoWifi , To use VoWiFi calling, all users require a compatible device and a stable Wi-Fi connection. Jio currently supports over 150 smartphones, whereas Airtel VoWiFi works on over 100 handsets.Here is the list of Devices supported by Airtel for Wifi Calling, you can check this list after few days of the product launch:  ListTo see the full specifications of this device:Oppo A12s

Oppo A12s does not support 5G Connectivity.The device comes with VoLTE along with Dual 4G Bands.This lets the user to enjoy 4G services on both Sim-Slots simultaneously.Also, do not forget to find all the detailed specifications and other latest updates related to Oppo A12s here.

Oppo A11K does not support 5G Connectivity.The device comes with VoLTE along with Dual 4G Bands.This lets the user to enjoy 4G services on both Sim-Slots simultaneously.Also, do not forget to find all the detailed specifications and other latest updates related to Oppo A11K here.

Check the steps below:-Open your Android's Google Play Store.Tap the magnifying glass icon.Type WhatsApp into the search bar, then tap Go.Tap the "WhatsApp Messenger" item.Tap INSTALL.Tap ACCEPT when prompted.Wait for WhatsApp to finish downloading, then tap OPEN.Tap AGREE AND CONTINUE.You can check the specs of OPPO A12s here: OPPO A12s

Check the steps below:-Open your Android's Google Play Store.Tap the magnifying glass icon.Type WhatsApp into the search bar, then tap Go.Tap the "WhatsApp Messenger" item.Tap INSTALL.Tap ACCEPT when prompted.Wait for WhatsApp to finish downloading, then tap OPEN.Tap AGREE AND CONTINUE.You can check the specs of OPPO A11K here: Oppo A11K

You don't need to enable VoLTE. Insert the Jio (VoLTE enabled) in any slot. By default, VoLTE will be active. If it is not, you can change the network preferences from Network option in settings.Go to Settings > Call Settings (Sim and Network)Tap Cellular networks > Enable Voice over LTE On/ Off.Alternatively, you can follow a much easier way:You can simply dial *#*#4636#*#* Choose Phone information.Click " Phone Information" and Toggle VOLTE Provisioned.Restart the phone and you are done.You can check the below video to get more clarity:You can check the specs of OPPO A12s here: Oppo A12s

You don't need to enable VoLTE. Insert the Jio (VoLTE enabled) in any slot. By default, VoLTE will be active. If it is not, you can change the network preferences from Network option in settings.Go to Settings > Call Settings (Sim and Network)Tap Cellular networks > Enable Voice over LTE On/ Off.Alternatively, you can follow a much easier way:You can simply dial *#*#4636#*#* Choose Phone information.Click " Phone Information" and Toggle VOLTE Provisioned.Restart the phone and you are done.You can check the below video to get more clarity:You can check the specs of OPPO A11K here: Oppo A11K

Many phones these days provide an inbuilt app locker. You can find this option as App Locker, generally under the Utilities option. You can simply open the option and select an app which you wish to lock. Now everytime you wish to open that app, you will have to enter the phone lock password or authenticate using fingerprint sensor, if your phone supports fingerprint.Alternatively, if your phone does not support this feature, you can download the app named app locker from play store.You can find it here.Configuring it is easy.Download App Lock from the Google Play Store.You will be asked to set a pattern lock when you launch it for the first time.Then you need to configure an E-Mail ID for security and backup purposes.Under the Privacy tab, you can find a list of apps installed. You can select any one of them to lock.Now whenever you open the app you have locked using AppLock, you will be asked for a password.You can also unlock it using your fingerprint.You can check the video here:You can check the specs of OPPO A12s  here: Oppo A12s