LG STYLO 5 CANT MAKE AND RECEIVE CALLS

H2O is an mvno that uses AT&T Wireless to provide Network Services. It is not owned by AT&T.   

    If your phone was not AT&T branded, then it cannot work on the AT&T network anymore. Your phone is a newer LG, LG stopped certifying phones to work after the 3-g shutdown because LG is no longer in the mobile phone business.

Not the right place this is AT&T not H20 

H2O wireless is in ATT network.

H2O uses att mobile network to do their business. My stylo 5 is tested and approved by att network from the public list. When h2o trying to add APN on my phone, it is using att. Net configuration. h2o tech support submit to att  a ticket regarding my issue June 22, 22, unfortunately no response yet. Hopefully this coming week, thank you.

Thanks for reaching out @PETERLI.

Since you're with H2O, we'd advise you to continue working with them towards a resolution. 

Darais, AT&T Community Specialist

Yes, however I was advised by h2O that they already submitted my issue to aATT, unfortunately no any response from ATT technical and encouraged me contact ATT for fast service. You know how frustrated without phone service. Thanks for your kind reply.

Hi PETERLI, we understand how important it is to have a working cellphone device and be able to make/receive calls,we are here to help!

First, we invite you to check the list of unlocked devices compatible to our network. The LG Stylo (LM-Q720CS, L722D,LM-Q720QM1) are the only ones compatible on the AT&T Network.

When that is confirmed, we recommend trying out a few fixes that may help with troubleshooting your wireless calls:

1. Turn your phone off and back on. This will help reset your device.
2. Make sure your software’s up to date to get the most recent version and make sure you have the latest features and device protection options.
3. Confirm you have wireless service to ensure you have a signal by checking our network coverage map. Please be advised that this is the AT&T Network coverage map, you may have to check with H20 Wireless for their coverage area map.
4. Turn off call forwarding, do not disturb and airplane mode which can be located by swiping down your notification bar. These settings are known to interfere with making/receiving calls.
5. Check that you aren’t blocking calls. When a call is blocked, it is routed directly to voicemail.

Hello Rhoda, I feel like touched from your sincere and technical advice. No matter it is a solution or not, your altitude to a stranger is greatly appreciated. h2O has much much more room to be improved in many aspects. Anyway thank you again I will try contact h2O.  

You are welcome PETERLI,

We hear you. Feel free to reach back out to us on AT&T Community Forums if you have any questions in the future. We hope all goes well with your communication with H20 Wireless.

Thank you for visiting us here on the AT&T Community Forums!

Rhoda, AT&T Community Specialist

Many phones have the required (signed) AT&T modem firmwares, but will not connect due to AT&T not setting their default provisioning features to include LTE and VoLTE for "unknown" device IMEIs. I sent an FCC complaint and was told by AT&T that this was "the system is functioning as designed".

The only workaround is buying the cheapest AT&T phone (I used an AT&T-provided 3G transition phone), registering that IMEI so it shows up in your online portal, and then swapping the SIM to the device you want. AT&T refuses to have a whitelisting process nor allow customers to specify enabled features for unknown IMEIs.