# MC7304 force to use ipv4 only **URL:** \ **Category:** Uncategorized\ **Created:** [September 28, 2023, 5:57am UTC](https://forum.sierrawireless.com/t/mc7304-force-to-use-ipv4-only/30728 "2023-09-28T05:57:13Z")\ **Posts on this page:** 1\ **Showing post:** 15
**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex025/user_avatar/forum.sierrawireless.com/jyijyi/32/4766_2.png) [@jyijyi](https://forum.sierrawireless.com/u/jyijyi)\ **Post date:** [September 29, 2023, 4:05am UTC](https://forum.sierrawireless.com/t/mc7304-force-to-use-ipv4-only/30728/15 "2023-09-29T04:05:01Z")
what do you mean by “cannot use AT command”? Do you have /dev/ttyUSB2 port? Is that you must use qmicli for data establishment? You can see other user’s qmicli log on MC7354: > [@MC7354 and T-Mobile US](https://forum.sierrawireless.com/t/mc7354-and-t-mobile-us/7324): > > I am trying to get MC7354 connect to T-Mobile US LTE. For some reason, it does not connect to LTE APN ([fast.t-mobile.com](http://fast.t-mobile.com)). 3/3.5G APN ([epc.t-mobile.com](http://epc.t-mobile.com)) seems to connect, but doesn’t get IP address. 3/3.5G is working from my phone with same SIM card. MC7354 detects SIM card fine and everything seems to be fine, but it just doesn’t initiate LTE call. Is MC7354 supposed to be only for AT&T LTE ? I thought if it works on AT&T, it should work on T-Mobile too. Below is various status info (actual… --- _[View the full topic](https://forum.sierrawireless.com/t/mc7304-force-to-use-ipv4-only/30728)._