@halab_i_repair: I received an iPhone 13 Pro Max with an unknown baseband issue. The phone had already been flashed and was stuck on the Hello screen, with no baseband showing. I separated the motherboard and checked the lower board prints one by one. I found four shorted pads related to the baseband. All four pads were shorted through the interposer. I set the hot air station to 500°C with an air pressure of 120, applied heat, and gently pressed the layer. After checking again, the short was gone. If you receive a phone that hasn’t been dropped but has this kind of issue, always check the lower board. Often, one or more pads may be shorted or have an open line, which can cause this problem. I successfully repaired this iPhone without performing a board swap

محمد فیصل

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Friday 13 November 2026 18:59:33 GMT