Convert LTE to VoLTE
LTE network getting popular because of its high speed for data as compare to the 3G or 3G. To access the 4G network and other functionalists of 4G, a phone should be LTE enabled and along with other features for 4G. . But most of the phones and network supports LTE network for data only. For voice phone switches back to the 3G . To use LTE network for voice functionality , the handset should be VoLTE capable. This leads to the conversion from LTE to VoLTE. It is not the handset only, the network service provider should also support VoLTE. To understand the conversion , first we need to understand the basic network and features.
Why VoLTE is required? Before LTE, in 2G/3G voice was using circuit switched network. Because the packet switched network was slower and for better quality, a dedicated circuit was required to flow the voice data. But with LTE the packet based call data can be transferred faster than dedicated channel even there is a virtual circuit formed over packet switched network. So it's obvious to switch voice over LTE.
LTE Network :
A very high speed data network which comes under 4th generation of mobile network. In 4G new network elements has been developed and deployed to achieve much faster data speed. The core network for LTE is EPC and the radio access network is E-UTRAN. These together provides access to internet from UE at higher speed. You can use any voip client to make voice calls over data network from mobile device. Call will be free and mobile operator will only charge for data consumed. But if a mobile phone connected to the WiFi for internet, the mobile operator will not get any money as the voip call will use data from WiFi internet. Moreover the telecom network will be totally skipped. This leads to less data usage for a mobile operator. Network operator needs to develop new IP based services to utilize LTE network fullest.
As we can see above, the network have the capability for high speed data. But still missing formal applications from mobile operator, those can consume more data and bring more revenue to the operator. IMS or Internet Multimedia Services, is a new concept which will work over high speed data connection to make internet applications formal. So that mobile phones can consume more and more data. In India reliance Jio offering voice over LTE network. Because of this users can have free voice call with good quality over data network. Its also called HD voice service. As compared to the previous 3G or 2G , the 4G network is developed to accommodate voice calls.
IMS is the network which provides all 2g/3G services over data network. It brings more utilization of network resources.
Voip and VoLTE:
Both are the common technologies these days for voice communication over IP network. At basic level they uses the same network protocols. But at concept level they are different.
In voip client/server are not standardized, each voip client have its own server and client. VoLTE is standardized, same phone may connect to any operator for voice over LTE by just changing sim card. No need to install any additional client software if , phone supports voice over 4G network.
A mobile, web or desktop application software is need. No special software need , either phone have inbuilt application or mobile operators can update phone over the air.
VoLte does not use the wifi internet, while other does. If it has to be wifi , then network and phone should support the wifi calling feature.
Voice over internet is from long time, while Volte is newer.
Voip have its own dialer and uses a separate list of contacts for calling. While VoLte uses the dialer from the phone and have access to all phone contacts.
In voip the user experience is different , while receiving and making calls. In VoLTE, use experiemce is same was on any other network.
Convert a phone from Lte to Volte:
The first step is to check if a phone supports LTE . Means it support 4G data. This you can check in settings for type of network connection it can support. If there is only option for 2G/3G then phone does not support LTE. In this situation only a new phone will be the option for VoLTE. Its not that you can change any hardware inside the device to enhance it for LTE.
Now you have checked that phone is LTE enabled. The next step to check is voice over LTE is supported by the phone. Whenever you purchase a phone , from model number , the support for volte can be found. If you have an older phone then insert a sim card which supports volte. If there is sign of Volte then phone supports the feature else not.
Phones also have feature setting in network setting option. E.g in Samsung S8 , got in settings-->Connections--> Mobile Network. There is the VoLTE calls settings. Other phones e.g iphone may also have setting.
Doing online research based on phone model you can also get the supported features. Here is the list of phones support the feature.
Non LTE phone to VolLTE conversion android and iphone:
Chances that phone have not this calling feature although 4G data is supported. In this case there are apps, those can be installed and phone will start supporting the new calling feature. Indian mobile operator Jio have option to convert the LTE to VoLte by installing the Jio4GVoice from google play store and for iphones itunes. There are other apps as well in store for supporting feature. Depends on mobile , you can install the required app.
Following are the steps for conversion for Jio:
Download and install Jio4GVoice in phone.
Open the app and give the required permissions and verify the Jio phone number. Before doing verification that you have Jio sim card inserted in sim slot with supports LTE.
Once successfully installed , there permission will be need to use the Jio app as default dialing app. So whenever next time any call will be from Jio number, will be a Volte call.
It is not just the phone, you might have feature with Jio , but when change the sim card, will not have calls over internet. The reason is that mobile operator do not support volte.
LTE to VolTE network conversion:
As in start we discussed that VoLTE should be supported both in phone and in mobile core network. GSMA Spec defines all interfaces , protocols and network nodes for voice service over LTE network. On phone side new stacks for ip calls pushed. On network side along with EPC , IMS is the newer network for voice over lte. IMS brings new nodes and new network protocols.
Does Volte always good to use?
Now with 4G , data and data speed is not the problem. Call having same quality as they have on circuit switched network. But is it good to use ip calling using mobile data always? Lets assume that you got 2GB daily data limit on your connection. You so lots of calling over data. Which might also includes video calling , this consumes lots of data. During calls all your data consumed (mobile operator may detected data only for voice calls). Now what to next ? Just use other number or recharge data immediately (if you can buy ). But if you have unlimited calling from the circuit switched network, there will not be any stopping. So before buying a sim , which supports voice over LTE, make sure that data will not be detected for voice call. If yes better go for plans over 3G calling , if you do lots of calling.