no service and imessage is not work either

Answers
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The iPhone 7 is not certified VoLTE therefore it will not work after the 31 July 2025 (probably)
It is very strange that you don't have any signal, you reset the network, did you update the carrier settings?
The SOS should be seen also without the SIM very strange, since you tried different phone I don't see what can cause it, where do you live other people have signal from other company?
Did you try to select the network operator manually?
IMessage I read multiple user reporting that was need couple of days to have it working, and some resolved connecting using the email
Probably the support can help you
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Hello referralcode_VQJI9 ,
Sorry to hear about the issue.
I verified your account and it appears that a ticket was escalated to our technical team for further investigations.
As soon as updates will be given you`ll be reached back via e-mail.Youcan also track the ticket status via My settings - My tickets, to also have a view on its progress.
Regarding the posts, we tend to close them if the issue is being investigated by our technical team, thus it helps have less convoluted posts.
Have a good one,
Raul, Community Moderator0