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Bad cellular signal after battery replacement

Good morning,

I have the feeling that I've read almost every thread on this issue so far, but haven't found a satisfactory solution for it yet. Some alternative hints would be highly appreciated.

Two weeks ago I replaced my battery since it lost almost 30 Prozent capacity over the last two years. Although I've proceeded carefully while replacing my battery I somehow managed to damage my Touch ID and my cellular connection (WiFi and Bluetooth seem to work anyway). In fact, I do get a signal, but a very weak one and I have the feeling that my battery is draining much faster. Touch ID is not very essential for me, but without cellular signal - by definition - a phone is not really worth a penny.

Here is what I've already done:

- Restore / fresh install / switch to public beta / hard and soft reset

- Check on all connections

- Replace the top-left antenna (Although some threads suggest that the down-right antenna is more prominent in establishing a cellular signal)

- The "Dropping Method"

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You don't really tell us much about the battery replacement procedure. How did it go? Sometimes the battery comes out really easily, other times it requires a lot of brute strength. Of course, when the adhesive pull tabs work properly, it's easy-peasy. When they break, you have to apply a lot of heat and or prying. So which was it for you?

If you had to pry the battery out, you may have damaged the logic board, disconnected the antenna wires or damaged the Lightning Port Flex. The cellular antennas, AFAIK, are on the bottom of the device. You may want to double-check your steps by following this guide.

On another note...and I say this with no offense intended, why would you or anyone else for that matter, believe that "dropping" a phone is a good troubleshooting idea? I've read this several times already on this forum and others. Somehow, people seem to believe that smacking, tapping, torquing, twisting, pressuring and dropping sensitive electronics devices will somehow make it work. Folks need to realize that this will only make a problem worse or create a new problem that will be difficult to troubleshoot.

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Part 1:

I've followed this guide. There was only one step where I had to improvise. That was when I was using a hairdryer instead of a professional heating tool. I've removed the battery by pulling out the strips from underneath. In the end, I had to apply a little pressure on the battery because the adhesive stripe in the middle didn't get as loose as expected.

My lightning port seems to work fine, and I have checked that all the connections are connected. Several times. Would you suggest, that I should replace my bottom antenna or do the symptoms point to a different issue in my case? If you like, I can provide more details.

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Part 2:

People don't think that "dropping" a phone is good troubleshooting. Some of them experiencing a non-functioning phone for a long period and find themselves in a situation, where they can't afford a repair, being sceptical about opening the phone by themselves or similar. While I completely agree with you, it is not really about reasoning per se. Especially if you consider the overwhelming feedback mentioning, that this solution seems to have "fixed" (obviously this is not a fix indeed) problems permanently. But sure, dropping a phone shouldn't be considered to have any positive effect on your phone anyway.

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