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My iPhone 6plus keep restarting and cashing ,I’ve replace the battery but it keeps doing that like it would stay on for a lil while then keep crashing my cover is missing also would that cost my iPhone to preform such actions
What cover are you talking about missing? Sounds to me like you got a damaged battery or your charging port is not allowing the proper voltage to get to the battery. Typically, a boot loop on an iPhone is caused by a battery issue.
Try once to restore the phone with iTunes in DFU mode. Sometimes it will work, specially if you already tried with couple of new batteries.
